Swiftwick's Managed Compression prevents bunching and hot spots by supporting all 3 arches in the foot. The Linked-Toe technology prevents blisters by eliminating bunching in the toe-box. The result is a sock designed to fit your feet perfectly while helping you do what moves you. Contoured Compression Fit supports every hill and valley of your foot Fiber First moisture-wicking fibers are sculpted into breathable designs Blister-Free Dry Perfromance reduces the chance of chafing Linked-Toe technology prevents bunching or voids in the toebox Best Use:   Running, Trail Running, Biking, Hiking Material:   67% Nylon / 28% Olefin / 5% Spandex Cushioning:   Minimum Compression:   Firm Height:    Quarter Crew Gender:   Unisex