Swiftwick's Managed Compression prevents bunching and hot spots by supporting all 3 arches in the foot. Their 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 Knee-high provides even support throughout calf to stabilize muscles 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, Hockey, Snowsports Material:   46% Olefin / 43% Nylon / 11% Spandex Cushioning:   Minimum Compression:   Firm Height:    Knee Gender:   Unisex If I knew how often I would be wearing the one pair I purchased I would've brought multiple copies in more colors as well. Looking forward to getting more of these. Very comfortable and keeps the lower leg warm