Black Sleep MaskWEARING A LUXURIOUS SLIPSILK SLEEP MASK AT THE SAME TIME (SO YOUR BEAUTY SLEEP ISN'T INTERRUPTED). Made using slipsilk Pure silk filler and internal liner not all silk sleep masks are created equal includes x 1 sleep mask. Slipsilk is specially commissioned and made to our exacting standards, developed and refined over ten years to provide the ultimate combination of shine, thickness, softness and durability. We use the highest grade (6A) long fiber