Our silk pillowcase is dyed with non-toxic dyes and made from the highest-grade pure mulberry silk.It's also the gift that keeps on giving - better skin and hair days, and night after night of smoother sleep.A must-have for sensitive skin conditions, allergies to dust mites, fragile or curly hair, and hot sleepers.And rest easy cause this pillowcase can withstand frequent machine washing. Designed in Toronto.MaterialIt is 100% long strand mulberry silk, extra shiny and grade 6A (highest grade). The silk is 22 momme (600 thread count). The pillowcase is Non-Toxic dyes and OEKO-TEX® 100 certified.