Silk pillowcases are known as "beauty pillowcases", it's very silky, cool, no matter how squeeze and rub, it's not easy to have wrinkle on your face when sleeping. Silk contains 18 essential amino acids for the human body, among which serine can nourish the skin, prevent skin aging, and clean the skin, increase the vitality of skin cells.A pair of silk pillowcases is one of the accessories of a famous model.