●SURGELITE: Lightweight, flexible, and durable cushioning technology for maximum comfort. ●DURAWRAP FLEX: A durable, yet light material that provides protection and flex so there is no break-in period. ●ORTHOLITE SOCK LINER: keeps feet cool and minimizes the effects of perspiration. ●International products have separate terms, are sold from abroad and may differ from local products, including fit, age ratings, and language of product, labeling or instructions.