The Short Answer
For sleep quality, skin health, and hair protection, silk outperforms standard cotton in almost every category. But not all silk is equal - and the right choice depends on what you're optimising for. Here's the full breakdown.
Friction and Hair Damage
Cotton has a relatively rough fibre structure that creates friction as you move during sleep. Over time, this friction causes hair cuticle damage, breakage, split ends, and frizz - especially for curly, fine, or chemically treated hair.
Silk, particularly 100% mulberry silk, has an ultra-smooth surface that allows hair to glide without resistance. The result: less breakage, less frizz, and hair that looks better in the morning with minimal effort.
Our Organic Silk Eye Mask and Silk Sleep Bundle use 100% mulberry silk for exactly this reason.
Skin Hydration and Anti-Ageing
Cotton is highly absorbent - which sounds like a benefit, but at night it means your pillowcase is drawing moisture away from your skin and absorbing your skincare products before they can work. If you're investing in serums and moisturisers, a cotton pillowcase is quietly undoing that work.
Silk is far less absorbent. It allows your skin to retain its natural moisture and keeps your skincare where it belongs - on your face. Over time, this contributes to fewer sleep creases, better hydration, and a reduction in the appearance of fine lines caused by repeated friction.
Temperature Regulation
Standard cotton can trap heat and moisture, leading to night sweats and disrupted sleep for warm sleepers. Organic cotton is better, but still tends to hold warmth.
Silk is naturally thermoregulating - it feels cool to the touch and adapts to your body temperature, keeping you comfortable whether the night is warm or cool. This makes it particularly well-suited to Australian summers and for anyone who runs hot at night.
Breathability
Both silk and cotton are breathable, but silk's protein-based fibre structure allows for superior airflow. For eye masks specifically, breathability matters - a non-breathable mask can cause sweating around the eyes and disrupt sleep. Our silk eye masks are designed to block light completely while remaining cool and breathable throughout the night.
Durability and Care
Cotton is more forgiving to wash - it tolerates higher temperatures and standard detergents. Silk requires a gentler approach: cool water, mild detergent, and line drying. With proper care, however, high-quality mulberry silk lasts for years and maintains its lustre and softness.
The Verdict
| Property | Silk | Cotton |
|---|---|---|
| Hair friction | ✅ Very low | ❌ Higher |
| Skin hydration | ✅ Retains moisture | ❌ Absorbs moisture |
| Temperature regulation | ✅ Thermoregulating | ⚠️ Can trap heat |
| Breathability | ✅ Excellent | ✅ Good |
| Ease of care | ⚠️ Gentle wash needed | ✅ Machine washable |
| Longevity | ✅ Years with care | ✅ Durable |
Our Recommendation
If you're serious about sleep quality, skin health, and hair protection, silk is the clear upgrade. Start with a Silk Pillowcase and Eye Mask Bundle to experience the difference, or go further with the Organic Grounding Sleep Bundle — which combines a grounding sheet with silk accessories for a complete, science-backed sleep environment.