Spenco® Performance Gel Heel Cushions provide superior cushioning in the heel area to reduce any type of heel pain. The dual density Thermoplastic Rubber Gel is designed to combine superior cushioning and energy return for ultimate performance inside an athletic or casual shoe. The anatomical cushioning system absorbs impact and shock where the heel needs it most. A slip-resist design keeps the heel cushion in place, and with a one-year unconditional guarantee, the Spenco Performance Gel Heel Cushion will provide activated energy from start to finish. One Size Fits All.