AETREX neutral orthotic is a great option for an average arch type or if you are unsure which customized orthotic to try, featuring a cupped heel to cushion and stabilize the foot. Details Top cover material: genuine leather Performance base: thermoplastic urethane for shape retention Insole thickness: .0125" Recommended for: professionals and fashionistas Best for: pumps, heels, ballet flats, dress shoes and shoes with no removable foot bed How to use: begin by removing the footbed in your shoes, if possible. Replace the insole with your AETREX Fashion Orthotics. When placing your new cobra shaped orthotics in your shoes, make sure the arch is placed on the inside of the shoe