The Hilly Twin Skin Medium Cushioning Anklet Socks are the ultimate anti-blister double-layer sock, designed to minimize friction and keep your feet comfortable during runs. They feature a double-layer construction to prevent rubbing and blisters, ensuring a distraction-free experience. LYCRA Sport Fibres are incorporated for lasting comfort, fit, shape, and performance. The Y-Heel design improves the fit and reduces slippage, while the Q-Skin Inner wicks away sweat and external moisture. The drirelease E.C.O. Outer fabric ensures a rapid dry time, and a vented upper and outer allow for optimal air circulation. A flat toe seam further reduces irritation and slippage, keeping the socks securely in place. The material composition is 72% Polyamide, 21% Polyester, 4% Cotton, and 3% Elastane. These socks are machine washable on a cool sports wash cycle and should not be tumble dried.