The AMP™ Insoles were built to boost the comfort of your boots. With a layer of memory foam that forms to the shape of your foot for custom comfort, they'll become the new standard in your workday. Beneath the memory foam is a polyurethane layer for maximum cushioning as you stand or step. The heel cups provide comfort and support to your heel area, and the underside is built with airflow channels that push air to your feet as you walk, helping to cool your feet. Get these insoles get going! This insole is compatible with most shoes and boots.