Swiftwick- PERFORMANCE TWELVE | Socks Built for Running | Moisture Wicking, Contoured Compression Knee High Socks SIGNATURE OLEFIN FIBER: Carefully selected lightwieght fiber that wicks moisture and will keep you dry and comfortable CONTOURED COMPRESSION FIT: Designed to support the contours of your foot. No voids, bunching, or blisters. LONG-LASTING: Endures the needs of an active lifestyle. Nylon reinforced heel and toe for durability in high-abrasion areas. KNEE HIGH CUFF: Rests just below the knee for maximum coverage and support. Stabilizes muscles to reduce fatigue and improve performance. MADE IN THE USA: Swift Socks are designed and crafted in the USA