If uncomfortable pressure is keeping you from wearing boots, you need this low profile, gel-lined boot bumper. Two thick gel pads protect the top of the foot (instep) and the back of the heel from pressure and rubbing, preventing painful blisters. The spandex / nylon fabric comfortably stretches across the foot and ankle for a snug fit under socks or hosiery. Caution: Do not apply to open wounds. If irritation, discomfort or poor circulation occurs, discontinue use and consult a physician.