Silk pillow cases are naturally hypoallergenic, so ideal for allergy sufferers. Due to high protein levels, silk is valued for benefits to skin and hair. As it doesn’t absorb moisture, it helps keep hair glossy and skin soft, which helps prevent wrinkles. The primary purpose of an eye mask is to block out light, and silk is effective in creating a barrier to help achieve total darkness. This can be particularly beneficial for people who need complete darkness to sleep, especially in environments with artificial light.