Unique, patent pending 3-POD Cushioning System absorbs shock and helps prevent over-pronation -– the leading cause of many common injuries such as plantar fasciitis. Provides advanced arch support and deep heel cupping; extra cushioning under the ball-of-foot results in a smooth transition to toe-off. Heat Moldable Layer: custom fit provides maximum support and performance. Low Friction Top Cloth with Antimicrobial Odor Control helps prevent blisters while controlling odor. Sold in pairs. Latex free.