Built for distance runners, this ultra-light and breathable sock keeps feet cool to help prevent blistering. Design: Lightweight yarn helps ventilation Snug fit with compression zones Built-in arch support and ribbed instep Ventilation panels help reduce blisters Reflective yarn on the cuff Strategically placed cushioning Cushioning around the Achilles for added protection High-performance design for racing, training and tempo runs Additional Details Materials: 91% Polyamide, 6% Elastane, 2% Polyamide (Recycled), 1% Polyester Cold machine wash; Do not bleach; Do not dry clean; Do not iron; Do not tumble dry Weight: 34g