The Arch 750 insole provides a firm, yet flexible arch support and lightweight cushioning. The 3/4 length insole is designed for use in a wide variety of footwear. 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, breakdown 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.