Made silk satin. Like the function and texture of silk, satin made wearings are good for our skin and hair while we sleep. It reduces the friction and leaves your skin and hair hydrated which is the key to reduce hair breakage, bedhead, split ends, and dry skin. The double-layer fabric design can wrap the hair well, and after using the hair mask, it will not stain the sheets when sleeping,it wont fade and it wont dye your hair and the pillow. Reversible design-two in one,looks perfect on both sids.Super soft and silk-like on both sides.You can change its color by turning it over and wear it on in another color. Adjustable Strap Design: With the help of the adjustable strap in the hat band, this sleep hat can accommodate heads of most sizes and meet the need of fastening head and maintaining your head safe and stable for a specific post-surgical treatment purpose. Wearing a satin bonnet when sleeping protects your hair from split ends. It protects your hair from the dryness caused by the friction between your hair and some moisture-absorbing materials like the cotton in your pillow. If you are the one with curly or wavy hair, this bonnet is definitely worth a try. Not only works well when you sleep as a sleep hat, but it also brings much convenience when you do some preparations before sleeping like washing face and brushing teeth or applying a face pack after taking a bath. Especially when you take on some skin-cares, it separates your hair from your face. You wont afraid that these cosmetics applying to your face make your hair tangled and sticky.