The contour sleep mask is designed to protect your delicate lashes. The beauty secret of celebrity hairstylists, dermatologists and beauty experts. The Slip contour sleep mask has been specifically designed with delicate eyelash extensions in mind. The shape of the contour on the inside of the sleep mask has been designed to sit away from your eyelids and allow additional space for your eyelashes to sit while you get your beauty sleep. Slip Pure silk products are made using slipsilk, developed and refined for over ten years to provide the ultimate combination of shine, thickness, softness and durability. In laboratory testing, SlipSilk pillowcases were shown to absorb significantly less face cream than cotton pillowcases (on average compared to cotton pillowcases with a 220-360 thread count), so they can help keep your skin’s moisture and valuable face and hair products where they belong, on your face and hair. SlipSilk was also shown to create 43% less friction on average, which can reduce stretching and tugging on delicate facial skin.