Waterproof foam: These heel inserts effectively prevent skin friction and cuts on the heel, and provide a long-lasting and comfortable fit to the heel Comfortable cushions: These cushions are made of durable, reusable, high-quality A-grade elastic and flexible sponges. The velvet like upper absorbs sweat and is skin friendly. Shoe size reducer: There are gel points on the insert. This anti-skid design can prevent your feet from slipping out of the shoes. Self adhesive: These heel stickers have a self adhesive back. Peel off the back cover and you can easily attach it to the back of the shoe, protecting your heel like a band-aid. 4 pairs of padded shoes: suitable for slightly larger shoes. Such as high heels, flat shoes, women's and men's leather shoes.