Baby Girls Satin Bonnet Is Made of 100% Premium Satin on Out Layer and Lining. Adopt natural material, without azo dyes. Very soft, light, smooth and comfortable. It protects baby’s hair and scalp, provide baby comfortable sleep. these reversible night hats are made of satin and polyester which is safe and reliable, soft and comfortable to wear, preserve scalp warm no sweat, cool no cold, keep your kids’ hair healthy growth, durable and will serve you for a long time