DURABLE CONSTRUCTION. Superfeet insoles keep their shape, delivering reliable support and comfort for up to 12 months or 500 miles, whichever comes first. DEEP HEEL CUP. Features the widest and deepest heel cup that offers maximum support and can help with natural shock absorption. SUPERFEET SHAPE. A high profile shape to help stabilize and support the foot, which can help reduce stress on feet, ankles and knees. YOUR PURCHASE MAKES A DIFFERENCE. Every year, 1% of Superfeet sales and 1,000+ volunteer hours go to support organizations working to shape strong foundations for a healthy future.. HIGH-DENSITY FOAM. Closed-cell foam supports and cushions the foot for long lasting comfort.. ORGANIC, ODOR-CONTROL COATING. All natural coating that eliminates odor-causing bacteria. STABILIZER CAP. Acts as the base of the insole that supports the rearfoot and provides structure and stability to the foam layer