FootBalance 100% Balance Narrow is an excellent all-around insole. It has been designed especially for runners but is equally suitable for various sports or everyday usage. The insole has a narrow fit with a small heel cup, but the width of the toe area is designed to accommodate a broad range of shoes. The insole provides moderate support and strong flexibility, returning energy to the feet. The heel cup and rebounding cushion provide shock absorption and comfort, decrease ankle rotation, and help prevent injuries.