· Premium Double-Lined Pure Mulberry Silk Bonnet: Both inside and outside of YFONG Silk Bonnet is made of 100% 22 MOMME 6A Grade pure mulberry silk. Different from satin sleep caps, silk night caps contain 18 hair-friendly amino acids. These natural protein fibers create a smooth, soft, lightweight, breathable and lustrous sleep nightcap, gentle for your hair and skin.· Smooth Hair & Keep Hairstyles: Soft and Smooth YFONG Mulberry Silk Night Cap have a soft, smooth texture that allows hair to slide across its surface, damage free, help lock hair moisture, prevent dryness, frizz, split ends. Keeps your hairstyle fresh looking, and prevents loss of hair and wake up with no frizz/bed head. Wearing your hair overnight in a silk hair bonnet is a naturally nourishing conditioning treatment.· OEKO Certified 100% Mulberry Silk Sleep Mask: Both sides of YFONG silk eye mask are made of 100% 6A 22momme natural mulberry silk. Unlike other fibers, such as cotton, silk is gentle on your skin and hair, aids in hydration and helps prevent dullness, fine lines, and wrinkles. Pure Silk is moisture wicking and helps regulate temperature without absorbing. YFONG Silk Sleep Masks are OEKO certified, which means harmless and non-toxic.· Excellent Light-Blocking Capability: Full wrap and nose-blind triangle design perfectly blocks out all light. Besides, The lining adds two layers of ultra-light blackout pads to effectively block light without adding eye mask weight much, provides you with a total darkness environment, so you will enjoy a sound sleep all night. It's so light that you may definitely take it anywhere and wear it anytime when you want a lightless sleep.· Ultra-Comfortable to Wear: Lightweight and wide band wrap design allows for even and low pressure on the face, eyes and ears. Thanks to the thermo regulating powers of natural organic silk, YFONG silk eye mask for sleeping is soft，smooth and cool to touch. Premium padding ensures maximum breathability and cool air flow all night long.