Slim fitting for ease of use in men's and women's shoe Can be used on top of existing insoles Helps in many back knee and heel pain treatment The cut away on the outside of the insole is designed to allow easier fitting into the shoe without significantly compromising the structure of the insole. Designed to help in back, knee, or heel pain treatments, these slim-fit unisex insoles aim to provide arch support These are a great all round 3/4 insoles designed to fit easily into you shoes