Coolmax Vertex Tab Ultra-Light Ankle Socks know how to keep their cool. Coolmax Polyester yarns are engineered to move moisture away from your skin and be fast drying. Combine that with a sock that weighs in at a mere 13 grams and you have the ultimate warm weather running companion. True Seamless construction reduces hotspots and blisters. Ultra high stitch count creates a super comfortable sock with a streamlined fit like no other. No slipping, no bunching, no blisters. Plus they even have that handy lilÌÄå_ÌÄå_ÌâåÈ tab on the back so they slip on easy.