The Hilly Twin Skin Medium Cushioning Anklet Socks are the ultimate anti-blister double-layer sock. They minimise friction on your feet to keep them comfortable. The socks feature a double-layer construction to prevent rubbing that causes blisters, ensuring a distraction-free run. LYCRA Sport Fibres provide lasting comfort, fit, shape, and performance. A Y-Heel design improves the fit and reduces slippage. The Q-Skin inner wicks away sweat and external moisture, while the drirelease E.C.O. outer ensures a rapid dry time. A vented upper and outer allows cool air to circulate for temperature control. The flat toe seam further reduces irritation and slippage, ensuring the socks remain in place. Material Composition: 72% Polyamide, 21% Polyester, 4% Cotton, 3% Elastane. Machine washable on a cool sports wash. Do not tumble dry.