Cloud & glow silk pillowcase is made from the highest quality 22 momme 6a grade 100% mulberry silk.benefitshelps your skin & hair retain natural moisturereduce the appearance of facial creases and linesprevent tangles, frizz, and damagehypoallergenic and eco-friendlystays comfortably cool when temperatures risethe smooth finish does not absorb moisture like traditional cottonlaundrywash at a temperature no higher than 30°c, preferably in a laundry bag, with an enzyme-free liquid detergent. do not use fabric softener and do not tumble dry.oeko-tex®silk pillowcase is certified with oeko-tex® standard 100. the certification guarantees that the product is tested and free of substances that can be harmful to your health and the environment.