The silk sleep cap and eye mask is made with 100% silk. Unlike the usual cheap satin you can find. The bonnet is soft and breathable, and feel amazing soft. Exquisite fabric protect sensitive scalp warm no sweat cool no cold. Our 8.3"x3.5" silk eye mask is made of top quality 19mm natural mulberry silk. It not only feel smooth against your skin but are also hypoallergenic, great for those with sensitive skin.