Providing medium cushioning the Hilly Twin Skin Anklet Socks are an essential for every runner. An anti-blister double-layer sock these socks are designed for active days on your feet. Ensuring lasting comfort and sweat wicking these socks are ideal for running keeping your feet cool and comfortable. Double-Layer Construction - Prevents rubbing that cause blisters for a distraction-free run. LYCRA Sport Fibres - Ensure lasting comfort, fit, shape and performance. Y-Heel - Improves the fit and reduces slippage. Q-Skin Inner - Wicks away sweat and external moisture. drirelease E.C.O. Outer - Ensures a rapid dry time. Vented Upper and Outer - Allows cool air to circulate. Flat Toe Seam - Further reduces irritation and slippage. Material Composition - 72% Polyamide, 21% Polyester, 4% Cotton, 3% Elastane.