Our most minimal trail running sock is made with recycled materials and designed to keep your feet light and agile. These socks feature friction-reducing technology and engineered heel fit allowing you to connect to the trail, road and beyond Features Friction-reducing yarn technology is strategically placed in the heel, toe and sole for durability and blister prevention Anatomical left and right sock so each foot has the perfect fit Deep heel pocket to prevent the sock from slipping into your shoe, ensuring the perfect fit and no-slip security Arch band support to fight fatigue Mesh zones for breathability Smooth toe closure for comfort Trail Run knit into bottom of arch Fabric: 97% Recycled Nylon/3% Spandex