A natural sleep aid and eye relaxer,it's crafted from imitation silk fabric.Only super-soft,super-smooth and ski-friendly silk offers the breathable,cool relaxation of the soothing masks found at the world's premier spas,a nice gift for women and men with sensitive eyes or skin conditions like eczema Silk has been shown to reduce friction,which can reduce pressure on creased skin;Helping protect the delicate areas around your eyes by preventing marks that could cause wrinkles;Silk naturally hydrates the skin while you sleep,reducing the look of dark circles The wide and adjustable strap sits at the back of your head,not rubbing against your ears;Fully adjustable, expands from 15.8" to 27.6" in circumference. The ophthalmologist explained people who can't close their lids fully can experience extremely dry eyes,wear a mask that is against your eyelids,it holds your eyes shut,so you don't wake up with dry, painful eyes.