The Hidden Contour socks are constructed with yarns made from recycled plastic waste and provide ultimate protection and impact resistance with plush cushion, all while contouring to your foot for a structured fit. Engineered with proprietary recycled Drynamix moisture management technology to wick away moisture from your skin, Hidden Contour socks keep feet cool and dry throughout every activity. The socks have been race tested and incorporate a hand-linked seamless toe, eliminating abrasion across the top of the foot for ultimate comfort. Hidden Contour socks feature an extra deep heel pocket to ensure that the socks fit your foot perfectly and won't slide down your foot during a run. Balega is working toward a more sustainable future while continuing to preserve our unmatched excellence in fit, feel, and performance. Proudly made in the USA, Hidden Contour socks offer a 1-year warranty.