The Arch 1000 insole provides stability, support, and full-length lightweight cushioning. The anatomically shaped arch support and deep heel cup combine to deliver maximum support and stability. Poron® Cellular Urethane provides superior shock absorption for the entire foot. The layer of Poron® is lightweight and durable. Also, it doesn't harden like PVC foam, break down like Latex, or reduce to a permanent compressed state like EVA foam. The anti-blister top cover controls the amount the foot slides across the insole's surface helping prevent blisters. Biostatic antimicrobial in the top cover helps protect against odor-causing bacteria and other microbes.