The oxygen eye mask is great for improving elasticity, hydration, dark circles, and texture under the eye - more dramatic results than just applying an under eye cream. I noticed a difference after my first use. I have yet to wear them while I sleep. I spend long evenings on my computer at home and just wear them while I'm awake - even while cleaning house. They're comfortable, cool & soothing, and I can still wear my glasses with them on. I like the length of the strip. It also covers the sides of my nose - which needs a little TLC as well. They are easy to apply. You just pull off the backing and stick them on your face and lightly press once. Amazingly, they stay on very well!