BeautySpaceNK Slip Pure Silk 360 Thread Count Navy Silk Pillow Case King In laboratory testing Slipsilk silk pillowcases made with 22 momme mulberry silk were shown to absorb significantly less face cream than cotton pillowcases* so they can help keep your skin s moisture and valuable face and hair products where they belong on your face and hair. This is a size king silk pillowcase. Anti sleep crease - Slipsilk has been shown to reduce friction allowing skin to glide along the pillow which can reduce pressure on creased skin and makes this is excellent anti acne pillowcase. This is a silk king pillowcase.