Gioia Cases 100% Mulberry Silk Pillowcase in Black. Crafted entirely out of luxurious 100% Mulberry Silk on both sides. This pillowcase is gentle on your hair and face, reducing hair frizz while your skin appearance is improved, now that is real beauty sleep! Its less absorbent fibres won’t absorb essential face creams, letting your face glide comfortably as you sleep. A well-kept beauty secret to anti-aging skin, sleeping on this silk pillowcase prevents sleep crease, compared to cotton pillowcases. The pillowcase regulates temperature, is hypoallergenic and most importantly is soft to touch, allowing you to experience a comfortable and relaxing sleep every night!