What could be better than sleeping on a Slip silk pillowcase? Wearing a luxurious Slip silk sleep mask at the same time (so your beauty sleep isn't interrupted). Made using Slip silk, pure silk filler and internal liner. Not all silk sleep masks are created equal. Slip silk is specially-commissioned and made to exacting standards, developed and refined over ten years to provide the ultimate combination of shine, thickness, softness and durability. They use the highest grade (6A) long fibre mulberry silk, with a thickness of 22 momme and enforce the strictest quality guidelines, including non-toxic dyes. Slip silk is laboratory tested and hypoallergenic. Dermatologist recommended. Includes 1 x sleep mask.