Double-lined silk that preserves your style and reduces friction through the night.
25 Momme Mulberry Silk
Silk Sleep Hair Bonnet
OVERNIGHT CARE FOR SMOOTHER HAIR
GENTLE ON HAIR: Minimises friction that contributes to frizz, breakage and tangles for smoother hair come morning
MOISTURE RETENTION: Silk doesn't absorb leave-in products or natural oils the way cotton can, so hydration and treatments stay where they belong
STYLE PRESERVATION: Helps maintain blowouts, curls, braids and protective styles between touch-ups
COOLING + BREATHABLE: Naturally thermo-regulating, keeping the scalp comfortable through the night
CLEAN SLEEP SURFACE: Woven with SILVADUR™ silver-ion technology, stays fresher between washes
Why Silk Matters for Hair
Hair moves against surfaces all night, creating friction that contributes to frizz, breakage and tangles. The ZILK bonnet wraps every strand in 25-momme mulberry silk, minimising friction so styles hold overnight.
Why 25-Momme
Many silk bonnets use lighter silk that thins and loses its smoothness over time. ZILK uses 25-momme 6A grade mulberry silk, double-lined so silk contacts hair on every surface. The denser weave holds its performance wash after wash.
The Clean Sleep Surface
ZILK bonnets are woven with SILVADUR™, DuPont's patented silver-ion technology, designed to resist odours and keep silk fresher between washes.
Silk's naturally smooth, dense weave is gentle against the scalp and holds up to overnight wear with serums, oils and treatments without snagging. The thermo-regulating 25-momme weave keeps the bonnet cool and breathable through the night for comfortable rest.
Suitable for: All hair types and textures
Treatment: Silver-ion infusion
Fabric: 100% 25-momme 6A Mulberry silk, double-lined interior and exterior
Fit: Non-adjustable, one size fits most (approx. 54–72 cm head circumference)
Certification: Oeko-Tex® certified, tested safe against harmful substances
Care: Hand wash or machine wash in mesh bag on delicate cycle; air dry flat.
FREE SHIPPING LIMITS:
- NL & BE from €70
- DE from €110
- International from €120
Orders received before 15:00 CET Mon-Fri are shipped same day; after 15:00 CET shipped the next day.
€3.95 shipping costs within NL on orders below free shipping threshold. For rates to other countries, please see our shipping policy
Returns: 60-day returns on unused, unwashed items in original packaging. EU 14-day right of withdrawal applies. See full policy.
Product information
Ritual of Restoration
Silk at every touchpoint
Every ZILK product is made from 25-momme mulberry silk, infused with silver ions. The collection is designed around a single idea: smooth, cool silk, engineered to stay clean between washes, supports the nightly ritual of rest.
INSIDE EVERY ZILK PIECE
Silver Ion Technology
Every ZILK piece is woven with SILVADUR™, DuPont's patented silver-ion treatment. Designed to keep silk cleaner between washes while staying gentle on skin.
- SILVADUR™ silver-ion treatment
- Fresher silk, wash after wash
- Oeko-Tex® certified for textile safety
- bluesign® certified for responsible textile production
ENGINEERED FOR ENDURANCE
25 MOMME SILK
Most silk pillowcases are woven at 19 to 22 momme. ZILK uses 25. The difference is a tighter weave and a smoother surface that holds its beauty through years of washes.
HIGH GRADE MULBERRY SILK
6A Silk Quality
ZILK uses 6A-grade mulberry silk, the top tier of the standard silk grading system. 6A silk is woven from the longest and smoothest fibers, giving the fabric a uniform weave that resists pilling and glides against skin and hair night after night.
INTERNATIONALLY VERIFIED SAFETY
OEKO-TEX® Certified Clean Sleep
ZILK meets the globally recognized OEKO-TEX® STANDARD 100—the world’s leading independent certification for textile safety. Every silk fiber is tested for more than 1,000 potentially harmful substances and verified safe for daily contact with skin.
- Independently tested for 1,000+ substances
- Certified safe for sensitive skin and hair
- Free from toxins, irritants, and allergens
- Certified STANDARD 100 by OEKO-TEX®
Frequently Asked Questions
Why use a silk bonnet instead of a cotton scarf or pillowcase alone?
Silk creates less friction than cotton and does not pull moisture or treatments from your hair. A bonnet offers 360-degree coverage so your lengths and ends stay protected even if you move around at night.
Is the ZILK silk bonnet good for curly and coily hair?
Yes. It is especially helpful for curls and coils because it helps preserve definition, reduce frizz and keep styles looking fresher between wash days.
Can I wear the bonnet with protective styles or extensions?
Yes. The full-coverage design is ideal for braids, twists, sew-ins and other protective styles. It helps reduce friction on your lengths and your edges.
Will the bonnet feel too hot?
Silk is naturally breathable and thermo-regulating so it feels cooler and more comfortable than many synthetic or heavy fabrics. If you tend to sleep warm, silk is a great option.
How often should I wash my silk bonnet?
This depends on your hair and product use. As a general guide, wash every 1–2 weeks or more often if you use heavy oils or styling products.
Does one size really fit most?
The bonnet is designed with a soft stretch band that comfortably fits most head sizes from approximately 54 to 72 cm. If you find most standard beanies or hats fit you, the bonnet should fit as well.
WHY CHOOSE ZILK?
