LilkSilk’s pillowcases are hypoallergenic and naturally dust-mite resistant, making them perfect for those that suffer from a range of allergies. Only terse style featured with flange-less has a hidden zipper closure to prevent slipping. The smooth texture of silk pillowcase helps prevent hair split and morning head. Silk pillowcases will wake you up in the morning every day with soft & gorgeous hair. Cool in the summer and warm in the winter, a mulberry silk pillowcase is a delightful luxury to be enjoyed throughout the year.