The dual-sided pillowcase allows you to pick the best sleep surface for your hair and skin, Silk or Bamboo. One side is made from 100% Mulberry Silk, which helps reduce frizz and lessen hair breakage. Along with promoting silky strands, silk also helps to eliminate sleep lines and wrinkle formations! The other side is made from 100% Bamboo, to help wick away excess moisture and fight face blemishes. Choose your side!