# What Scientific Principles Validate the Long-Standing Practice of Covering Textured Hair for Moisture Retention? ❉ Question

**Published:** 2025-05-30
**Author:** Roothea
**Categories:** Question

---

![Women braid textured hair, passing down ancestral techniques in a scene celebrating Black hair traditions. This practice demonstrates deep commitment to heritage while emphasizing beauty, self-expression, and the significance of communal support for holistic hair wellness](/wp-content/uploads/2025/05/women-braiding-textured-hair-cultural-exchange-and-hair-care-practices.jpg)

![The elegant cornrow braids demonstrate a legacy of ancestral braiding, showcasing scalp health through strategic hair part placement, emphasizing the cultural significance of protective styles, hair density considerations, and low manipulation practices to support healthy textured hair growth rooted in natural hair traditions.](/wp-content/uploads/2025/05/cornrow-braids-on-young-black-girl-showcasing-scalp-health-and-shine.jpg)

## Roots

For generations, the practice of covering [textured hair](/area/textured-hair/) has been a quiet yet profound ritual, passed down through the hands of ancestors, mothers, and caretakers. It is a tradition woven into the very fabric of Black and mixed-race heritage, often seen as a simple act of protection, yet holding a deeper scientific validation. This ancient wisdom, often dismissed as mere folklore, reveals itself upon closer inspection to be deeply aligned with modern understanding of hair biology and environmental interaction.

The protective covering, whether a silken scarf or a bonnet, creates a microclimate, a sanctuary for strands that inherently seek moisture. This enduring practice speaks to a legacy of ingenious care, born from a deep connection to the hair itself and the environments in which it thrived or endured.

The journey of understanding why covering textured hair works begins at the very structure of the strand. Textured hair, with its unique coil and curl patterns, presents a distinct architecture compared to straighter hair types. This morphology, a gift from ancestral lineages, directly influences how moisture behaves within and around the hair shaft. The outer layer of each hair strand, the **cuticle**, comprises overlapping scales, akin to shingles on a roof.

In highly textured hair, these cuticles can be naturally more lifted or prone to lifting, which allows moisture to enter and escape more readily. This characteristic, often termed **high porosity**, means that while textured hair can readily absorb water and products, it can also lose that hydration with equal swiftness, leading to dryness and brittleness if not properly tended. The long-standing practice of covering the hair, therefore, acts as a physical barrier, a gentle guardian against the environmental forces that conspire to strip away precious moisture.

> The practice of covering textured hair, rooted in ancestral wisdom, scientifically validates its role in preserving moisture by creating a protective microclimate around the hair.
Beyond the cuticle’s architecture, the hair’s natural [lipid layer](/area/lipid-layer/) plays a significant role in its [moisture retention](/area/moisture-retention/) capabilities. Lipids, which are fatty molecules, coat the outer surface of the hair, forming a thin, protective film. This **lipid layer**, which includes compounds like 18-methyleicosanoic acid (18-MEA), provides a hydrophobic, or water-repelling, barrier. This barrier is essential for minimizing water loss and shielding the hair from external damage.

When this lipid layer is compromised by [environmental factors](/area/environmental-factors/) like harsh weather, pollution, or even frequent washing with certain cleansers, the hair becomes more vulnerable to moisture evaporation. Covering the hair helps to preserve the integrity of this delicate lipid barrier, allowing it to perform its natural function more effectively and prolonging the hydration that has been carefully applied.

![This striking portrait captures the essence of modern African diaspora beauty, showcasing elaborate blonde locs cascading beautifully. Adorned with elegant silver jewelry, she embodies identity and power, offering a unique celebration of ancestral heritage in contemporary hairstyling expression and wellness](/wp-content/uploads/2025/05/monochrome-portrait-woman-with-long-blonde-locs-and-modern-jewelry.jpg)

![The image celebrates the intimate act of nurturing textured hair, using rich ingredients on densely coiled strands, reflecting a commitment to holistic wellness and Black hair traditions. This ritual links generations through ancestral knowledge and the practice of self-love embodied in natural hair care](/wp-content/uploads/2025/05/applying-hair-cream-to-coiled-hair-a-black-and-white-portrait.jpg)

## Ritual

Stepping deeper into the practical application of this knowledge, we acknowledge the enduring ritual of hair covering, a practice that has evolved across generations and geographies, yet retains its core purpose. For those with textured hair, the act of wrapping, tying, or enclosing strands in a protective fabric is not merely a stylistic choice; it is a conscious act of care, a legacy of foresight passed down from those who understood the delicate balance required to maintain vibrant hair. This wisdom, born from centuries of observation and adaptation, finds its echo in contemporary scientific understanding, illuminating how traditional methods serve to maintain the hair’s vital hydration.

The science behind covering textured hair for moisture retention centers on creating a controlled environment around the hair shaft. This enclosed space minimizes the exposure of hair to external elements that can accelerate moisture loss. Consider the effects of environmental factors: dry air, wind, and even pollution can actively draw moisture from the hair. Cold, dry air causes the cuticle scales to lift, making it harder for hair to retain moisture, while wind can tangle strands and strip away hydration.

By covering the hair, a protective shield is formed, reducing the impact of these dehydrating forces. This creates a localized atmosphere where humidity levels can be maintained, allowing humectants, those moisture-attracting ingredients often found in hair products, to function optimally by drawing moisture from the air and into the hair shaft.

> The tradition of covering textured hair functions as a practical atmospheric regulator, shielding strands from dehydrating environmental forces.
Historically, this protective aspect of [hair covering](/area/hair-covering/) has been vital for the survival and well-being of textured hair across the African diaspora. During the transatlantic slave trade, enslaved Africans were stripped of their [traditional hair care](/area/traditional-hair-care/) tools and practices, and their hair was often shaved as a dehumanizing act. Yet, the ingenuity of [ancestral practices](/area/ancestral-practices/) persisted. Head coverings, while sometimes enforced as symbols of subjugation, were also reclaimed as tools of resistance and protection.

These coverings shielded hair from the harsh sun and elements encountered during forced labor, preserving precious moisture in challenging conditions. The continuity of this practice speaks to its deep-seated efficacy, a testament to ancestral wisdom in the face of adversity.

What are some traditional ingredients that aid moisture retention?

- **Shea Butter** ❉ A rich, nourishing butter widely used across Africa for centuries, known for its moisturizing and sealing properties, creating a protective barrier against dryness.

- **Coconut Oil** ❉ A versatile oil used in many African communities to nourish and protect hair, prioritizing moisture.

- **Chebe Powder** ❉ A traditional African hair powder, particularly associated with the Basara Tribe of T’Chad, known for increasing hair thickness and retaining moisture, made from crushed leaves and nuts.

- **Aloe Vera** ❉ A plant known for its hydrating qualities, often used in traditional hair care for moisture and scalp health.
The practice of covering hair also minimizes mechanical stress. Textured hair, due to its coiled nature, can be prone to tangling and breakage, especially during sleep or when exposed to friction from clothing or surfaces. A protective covering, such as a silk or satin bonnet, creates a smooth surface that reduces this friction, allowing strands to glide rather than snag.

This simple act safeguards the delicate hair cuticle, preventing the raised scales that lead to [moisture loss](/area/moisture-loss/) and structural damage. It is a quiet testament to the intuitive understanding of hair mechanics that has been passed down through generations, ensuring the longevity and health of each strand.

![The application of an avocado mask embodies a holistic approach to textured hair health, celebrating ancestral practices and emphasizing the importance of moisture retention and scalp health for optimal coil definition and resilience, reflecting a commitment to natural wellness.](/wp-content/uploads/2025/05/woman-applies-natural-avocado-hair-mask-for-textured-hair-wellness.jpg)

![Bathed in radiant sunlight, these Black and Brown women engage in the practice of styling their diverse textured hair patterns, highlighting ancestral heritage, affirming beauty standards, and demonstrating holistic haircare routines that honor coils, waves, springs, and undulations in a shared setting, reflecting community and self-love.](/wp-content/uploads/2025/05/black-and-brown-women-in-sunlight-styling-natural-textured-hair.jpg)

## Relay

As we delve into the intricate interplay of science and heritage, the question arises: how does the enduring wisdom of covering textured hair translate into a profound understanding of its role in shaping not just individual hair journeys, but broader cultural narratives and the future of hair traditions? This exploration transcends simple protective measures, revealing a sophisticated connection between ancestral practices, the biological realities of textured hair, and the social contexts that have long informed its care.

The [scientific principles](/area/scientific-principles/) validating hair covering for moisture retention are deeply rooted in the biophysics of the [hair shaft](/area/hair-shaft/) and its interaction with its environment. Textured hair, with its characteristic helical structure, possesses a unique surface area and cuticle arrangement. This structure, while beautiful, can make it more susceptible to moisture loss compared to straighter hair types. The cuticle, the outermost protective layer, tends to be more lifted or uneven in its arrangement in textured hair, which allows for easier ingress and egress of water molecules.

When hair is exposed to dry air, the process of evaporation is accelerated, pulling water from the hair’s cortex. Covering the hair creates a localized, humid microenvironment, significantly reducing the vapor pressure gradient between the hair and the surrounding air. This slows down the rate of water evaporation from the hair shaft, effectively preserving its internal hydration.

What is the impact of humidity on hair porosity?

The concept of **hair porosity** is central to this understanding. [High porosity](/area/high-porosity/) hair, common among textured hair types, has a cuticle layer with gaps or spaces, allowing moisture to be absorbed quickly but also lost rapidly. Conversely, low [porosity hair](/area/porosity-hair/) has tightly bound cuticles, making it difficult for moisture to penetrate but also challenging for it to escape. Covering the hair helps to mitigate the challenges of both extremes.

For high porosity hair, it acts as an occlusive barrier, preventing the rapid escape of moisture that has been absorbed. For low porosity hair, while the initial absorption might be slower, the enclosed environment created by covering can aid in retaining the moisture once it has penetrated, preventing it from being drawn out by dry ambient air. Humectants, substances that attract water, work in conjunction with this principle. In a humid environment, humectants in hair products draw moisture from the air into the hair. The covering helps to maintain this humid microclimate, allowing humectants to continuously hydrate the hair without the risk of drawing moisture out of the hair in dry conditions, a phenomenon known as back-diffusion.

The lipid layer, specifically the F-layer composed of 18-MEA, forms a hydrophobic barrier on the hair’s surface. This layer reduces friction between hair fibers and minimizes water absorption. Damage to this layer, often from chemical treatments or environmental exposure, renders the hair more hydrophilic and prone to swelling and breakage.

Covering the hair provides a physical safeguard against such external aggressors, preserving the integrity of this natural protective coating. This preservation is not merely about preventing moisture loss; it is about maintaining the hair’s structural resilience and overall health, a concept deeply ingrained in ancestral care practices that sought to preserve the hair’s vitality.

Consider the historical context of hair covering as a strategy for resilience. During the 18th century, the Tignon Laws in Louisiana mandated that free Black women wear headwraps, ostensibly to mark their social status and undermine their perceived allure. Yet, these women, with profound ingenuity, transformed this tool of oppression into a statement of defiance and beauty, decorating their tignons with elaborate styles and luxurious fabrics. This act of reclaiming the headwrap as a symbol of pride also served a practical purpose: it protected their hair from the elements and preserved intricate styles, reflecting an innate understanding of hair’s needs in challenging climates.

This historical example powerfully illuminates how a practice rooted in scientific principle ❉ protecting hair from environmental stressors ❉ was simultaneously a powerful act of cultural affirmation and resistance. (Byrd & Tharps, 2001)

The cultural significance of hair covering extends beyond mere protection; it is a profound expression of identity and community. In many African cultures, hairstyles and their coverings conveyed marital status, age, wealth, and even spiritual beliefs. The communal act of hair styling and covering strengthened social bonds.

This collective wisdom, passed down through oral traditions and lived experience, anticipated modern scientific findings regarding hair’s vulnerability to environmental factors and the benefits of creating a stable, moist environment. The protective covering, therefore, is not simply a piece of fabric; it is a repository of ancestral knowledge, a living archive of care that continues to safeguard the health and heritage of textured hair.

![In this monochromatic exploration, the sitter’s coiled textured style, created with a rod set, evokes elegance and a celebration of natural Black hair traditions strategic lighting emphasizes the hair](/wp-content/uploads/2025/05/monochromatic-portrait-of-elegant-woman-showcasing-coiled-textured-hair-design.jpg)

![This evocative photograph celebrates the elegance and cultural significance of textured hair, styled with silver adornments, drawing attention to the inherent beauty and expressive potential found in Black hair traditions, while subtly narrating ancestral heritage and holistic approaches to hair care through artistic presentation.](/wp-content/uploads/2025/05/elegant-woman-with-long-textured-hair-and-embellishments-in-black-and-white.jpg)

## Reflection

The quiet ritual of covering textured hair, observed through generations, speaks to a wisdom that runs deeper than mere aesthetics. It is a testament to the enduring ingenuity of those who came before us, a practice born from necessity and observation, now validated by the precise language of science. Each silken wrap, each carefully placed bonnet, becomes a vessel of heritage, carrying forward the legacy of care, resilience, and self-preservation that has always defined the journey of textured hair.

This practice, at once personal and communal, reminds us that the quest for hair health is not a solitary modern pursuit, but a continuation of ancestral traditions, a living dialogue between the strands we carry and the profound wisdom embedded in our past. It is a luminous thread, connecting the whispers of ancient mothers to the vibrant expressions of identity today, ensuring that the soul of each strand remains unbound and celebrated.

![The Dogon man’s intense gaze and carefully braided hair, combined with the traditional mask, create a powerful visual narrative on heritage and identity. Textured hair patterns add visual depth and resonate with holistic hair care principles and styling practices in diverse mixed-race contexts](/wp-content/uploads/2025/05/dogon-mans-striking-portrait-with-traditional-mask-and-braided-hair.jpg)

![This expressive monochrome portrait captures the inherent beauty and volume of spiraling textured hair, highlighting cultural connections to textured hair traditions the woman](/wp-content/uploads/2025/05/black-and-white-portrait-woman-with-long-spiraling-textured-hair-style.jpg)

## References

- Byrd, A. & Tharps, L. L. (2001). Hair Story: Untangling the Roots of Black Hair in America. St. Martin’s Press.

- Robbins, C.R. (2002). Chemical and Physical Behavior of Human Hair. Springer.

- Korte, S. et al. (2019). Mechanisms of Bleaching Affecting the Hydrophobic Protection Layer of Human Hair Surface. International Journal of Cosmetic Science, 41(1), 28-35.

- Takahashi, T. (2021). A Highly Resistant Structure Between the Cuticle and the Cortex of Human Hair. International Journal of Cosmetic Science, 43(3), 254-262.

- Ruetsch, S. B. et al. (2004). The Hair Fiber. Cosmetic Dermatology: Principles and Practice, 2nd ed. 34-45.

## Glossary

### [Head Covering Laws](https://roothea.co/area/head-covering-laws/)

Meaning ❉ Head Covering Laws refer to formal statutes or institutional directives that govern the practice of placing material over one's hair.

### [Porosity Hair](https://roothea.co/area/porosity-hair/)

Meaning ❉ Porosity Hair refers to the hair shaft's capacity to absorb and retain moisture, a characteristic determined by the openness or compactness of its outermost protective layer, the cuticle.

### [Head Covering Symbolism](https://roothea.co/area/head-covering-symbolism/)

Meaning ❉ A gentle practice, head covering symbolism speaks to the layered significance of adorning textured hair with fabrics.

### [Hair Covering](https://roothea.co/area/hair-covering/)

Meaning ❉ A hair covering, a gentle shield for delicate strands, signifies an essential component in the mindful preservation of textured hair's innate vitality.

### [Black Hair Standing](https://roothea.co/area/black-hair-standing/)

Meaning ❉ Black Hair Standing describes the distinct orientation of coily and kinky hair patterns, where strands naturally rise from the scalp, exhibiting an inherent lift rather than lying flat.

### [Head Covering Practices](https://roothea.co/area/head-covering-practices/)

Meaning ❉ Head covering practices for textured hair stand as a gentle pillar in hair care understanding and systematization, particularly for Black and mixed-race hair.

### [Lipombo Practice](https://roothea.co/area/lipombo-practice/)

Meaning ❉ Lipombo Practice distills the art of tending to textured hair into a gentle, yet precise, framework for consistent well-being.

### [Botanical Moisture Retention](https://roothea.co/area/botanical-moisture-retention/)

Meaning ❉ Botanical Moisture Retention speaks to the gentle science of utilizing plant-derived components to sustain hydration within textured hair strands.

### [Ancestral Hair Covering](https://roothea.co/area/ancestral-hair-covering/)

Meaning ❉ Ancestral Hair Covering, within the Roothea understanding, signifies a deliberate practice

### [Spiritual Practice](https://roothea.co/area/spiritual-practice/)

Meaning ❉ Spiritual Practice, within the realm of textured hair, refers to the intentional, reverent engagement with one's coils and kinks, viewing daily care not merely as routine, but as a deliberate act of self-connection and heritage acknowledgement.

## Explore Your Heritage

### [Ancestral Hair Covering](https://roothea.co/term/ancestral-hair-covering/)
![The striking monochrome portrait emphasizes the subject](https://roothea.co/wp-content/uploads/2025/05/monochrome-portrait-of-striking-african-man-adorned-with-ceremonial-hair-art.jpg)

### [Ayurvedic Hair Practice](https://roothea.co/term/ayurvedic-hair-practice/)
![The application of an avocado mask embodies a holistic approach to textured hair health, celebrating ancestral practices and emphasizing the importance of moisture retention and scalp health for optimal coil definition and resilience, reflecting a commitment to natural wellness.](https://roothea.co/wp-content/uploads/2025/05/woman-applies-natural-avocado-hair-mask-for-textured-hair-wellness.jpg)

### [What Scientific Principles Validate the Historical Effectiveness of Plant-Based Cleansers for Textured Hair Heritage?](https://roothea.co/question/what-scientific-principles-validate-the-historical-effectiveness-of-plant-based-cleansers-for-textured-hair-heritage/)
![The portrait honors an elder statesman](https://roothea.co/wp-content/uploads/2025/05/resilient-elder-radiating-wisdom-black-and-gray-portrait-natural-hair-locs.jpg)

### [What Scientific Principles Affirm the Efficacy of Traditional Textured Hair Emollients?](https://roothea.co/question/what-scientific-principles-affirm-the-efficacy-of-traditional-textured-hair-emollients/)
![The monochrome image captures a nightly self-care ritual, securing a silk bonnet to protect textured hair and preserve moisture, reflecting ancestral heritage and Black hair traditions rooted in maintaining healthy, well-hydrated coils, promoting wellness and embracing the natural beauty of coiled formations.](https://roothea.co/wp-content/uploads/2025/05/woman-securing-silk-bonnet-overnight-hair-protection-black-and-white-photo.jpg)

### [In What Ways Did Ancient African Hair Practices Convey Social Standing and Heritage?](https://roothea.co/question/in-what-ways-did-ancient-african-hair-practices-convey-social-standing-and-heritage/)
![Radiating innocence, the child’s hairstyle presents a contemporary take on age-old black hair traditions, showcasing distinctive coil patterns. This image encourages thoughtful reflection on textured hair narratives, promoting acceptance, appreciation, and inclusive representation.](https://roothea.co/wp-content/uploads/2025/05/child-portrait-radiating-warmth-curly-top-bun-hairstyle-textured-hair-beauty.jpg)

### [What Scientific Principles Validate the Historical Use of Oils for Textured Hair?](https://roothea.co/question/what-scientific-principles-validate-the-historical-use-of-oils-for-textured-hair/)
![Hands gently massage a scalp treatment into tightly coiled hair, amidst onlookers, symbolizing a deep connection to heritage and holistic self-care. The black and white aesthetic underscores the timelessness of these ancestral practices, reflecting the enduring beauty standards and communal bonds associated with textured hair.](https://roothea.co/wp-content/uploads/2025/05/black-and-white-image-of-young-woman-receiving-scalp-treatment-outdoors.jpg)

### [How Do Historical Hair Covering Practices Continue to Influence Modern Textured Hair Care and Identity?](https://roothea.co/question/how-do-historical-hair-covering-practices-continue-to-influence-modern-textured-hair-care-and-identity/)
![This black and white portrait illustrates the ancestral practice of textured hair care, a mother nurturing her child](https://roothea.co/wp-content/uploads/2025/05/mother-combing-childs-textured-hair-at-window-black-and-white-portrait.jpg)

### [Spiritual Hair Covering](https://roothea.co/term/spiritual-hair-covering/)
![This powerful monochrome captures the profound ancestral heritage embodied in a Maasai woman, her head adornment enhancing the natural beauty of low porosity high-density coils, showcasing cultural artistry in protective styling helix definition and celebrating sebaceous balance care traditions.](https://roothea.co/wp-content/uploads/2025/05/maasai-womans-coiled-hair-adornment-expression-of-heritage-and-identity.jpg)

### [What Scientific Principles Validate Ancient Textured Hair Oiling Heritage?](https://roothea.co/question/what-scientific-principles-validate-ancient-textured-hair-oiling-heritage/)
![This black and white photograph captures the essence of natural afro textured hair, celebrating its springy coil formation and intricate beauty. Emphasizing its coil texture, the portrait embodies strength and confidence, promoting positive self-image and highlighting the importance of ancestral heritage and expressive styling within diverse hair narratives.](https://roothea.co/wp-content/uploads/2025/05/elegant-portrait-of-a-woman-with-afro-textured-hair-in-black-and-white.jpg)

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            "@id": "https://roothea.co/area/porosity-hair/",
            "name": "Porosity Hair",
            "url": "https://roothea.co/area/porosity-hair/",
            "description": "Meaning ❉ Porosity Hair refers to the hair shaft's capacity to absorb and retain moisture, a characteristic determined by the openness or compactness of its outermost protective layer, the cuticle."
        },
        {
            "@type": "DefinedTerm",
            "@id": "https://roothea.co/area/head-covering-laws/",
            "name": "Head Covering Laws",
            "url": "https://roothea.co/area/head-covering-laws/",
            "description": "Meaning ❉ Head Covering Laws refer to formal statutes or institutional directives that govern the practice of placing material over one's hair."
        },
        {
            "@type": "DefinedTerm",
            "@id": "https://roothea.co/area/head-covering-symbolism/",
            "name": "Head Covering Symbolism",
            "url": "https://roothea.co/area/head-covering-symbolism/",
            "description": "Meaning ❉ A gentle practice, head covering symbolism speaks to the layered significance of adorning textured hair with fabrics."
        },
        {
            "@type": "DefinedTerm",
            "@id": "https://roothea.co/area/black-hair-standing/",
            "name": "Black Hair Standing",
            "url": "https://roothea.co/area/black-hair-standing/",
            "description": "Meaning ❉ Black Hair Standing describes the distinct orientation of coily and kinky hair patterns, where strands naturally rise from the scalp, exhibiting an inherent lift rather than lying flat."
        },
        {
            "@type": "DefinedTerm",
            "@id": "https://roothea.co/area/head-covering-practices/",
            "name": "Head Covering Practices",
            "url": "https://roothea.co/area/head-covering-practices/",
            "description": "Meaning ❉ Head covering practices for textured hair stand as a gentle pillar in hair care understanding and systematization, particularly for Black and mixed-race hair."
        },
        {
            "@type": "DefinedTerm",
            "@id": "https://roothea.co/area/lipombo-practice/",
            "name": "Lipombo Practice",
            "url": "https://roothea.co/area/lipombo-practice/",
            "description": "Meaning ❉ Lipombo Practice distills the art of tending to textured hair into a gentle, yet precise, framework for consistent well-being."
        },
        {
            "@type": "DefinedTerm",
            "@id": "https://roothea.co/area/botanical-moisture-retention/",
            "name": "Botanical Moisture Retention",
            "url": "https://roothea.co/area/botanical-moisture-retention/",
            "description": "Meaning ❉ Botanical Moisture Retention speaks to the gentle science of utilizing plant-derived components to sustain hydration within textured hair strands."
        },
        {
            "@type": "DefinedTerm",
            "@id": "https://roothea.co/area/ancestral-hair-covering/",
            "name": "Ancestral Hair Covering",
            "url": "https://roothea.co/area/ancestral-hair-covering/",
            "description": "Meaning ❉ Ancestral Hair Covering, within the Roothea understanding, signifies a deliberate practice"
        },
        {
            "@type": "DefinedTerm",
            "@id": "https://roothea.co/area/spiritual-practice/",
            "name": "Spiritual Practice",
            "url": "https://roothea.co/area/spiritual-practice/",
            "description": "Meaning ❉ Spiritual Practice, within the realm of textured hair, refers to the intentional, reverent engagement with one's coils and kinks, viewing daily care not merely as routine, but as a deliberate act of self-connection and heritage acknowledgement."
        }
    ]
}
```


---

**Original URL:** https://roothea.co/question/what-scientific-principles-validate-the-long-standing-practice-of-covering-textured-hair-for-moisture-retention/
