Belledorm Luxury Silk Pillowcases are manufactured to the highest quality from finest 100% pure silk. Silk is has many positive attributes along with being sumptuously soft and looking absolutely beautiful draped on your bed. One the best things about silk is its natural temperature regulating properties which give silk a unique ability to breathe. This helps in removing moisture and perspiration away from the body during sleep, keeping the body dry and cool. Brand: Belledorm Washable 100% Silk Pillowcase Material: 100% Mulberrry Silk. Thread Count: 450. 1 Pillowcase. An all climate fabric, warm in winter and cool in summer. 100% natural and hypoallergenic and is highly absorbent and can help alleviate issues like sensitive skin and eczema.