Like other things you wear, the best comfort is a combination of the right material and the right fit. With Extreme H2O Daily, you get this combo. The lens material has unique hydration properties that keep it from losing water. Because of this, your eyes stay hydrated and moist all day long. The lens also comes in multiple sizes. This enables your doctor to fit you in a lens that is the right size for your cornea. The combination of right size lens, and the water loving material, is what makes the lens so comfortable.