Made of sponge and durable sweat-absorbent fabric, comfortable, breathable. With a shell-shaped design, which can support your feet and relieve pain. Our heel grips are made of a soft sponge, good for reducing the friction between shoes and feet to avoid foot pain and blisters after long walking. You will feel comfortable using these heel cushion both on bare feet and with socks on. sports insole can be cut along the dent according to the actual size of the shoe worn to make it fit the heel better, effectively preventing the new shoe from rubbing against the heel. The heel pads for shoes have self-adhesive backs. Peeling off the back cover, you can stick them on your shoes' backs conveniently. Heel liners are easily moved, heel inserts for women will keep you comfortable for one day full of walking. Our shoe heel grips can be applied to most types of shoes, such as high heels, flats, boots, leather shoes, etc. Heel cushion pads are also suitable to new shoes and slightly bigger shoes. Hi Here: Please note the shoe heel inserts arn't suitable for shoes that have a lot of fluff on the shoe's inner suede.