Also known as ‘insocks’, insole socks are an additional piece of material, which is added to the shoe at the very end of the making process. They serve to cover up the insoles and screws/staples that attach the heels. They are also an opportunity to add some padding to the shoes for comfort. Insole socks are normally made from a soft leather or fabric (often the same material that was used for the lining) and foam padding. We sell insock foam here.