Built to Perform The Letho Trainer Sock has been designed to keep your feet cooler & dryer for longer. COOLMAX yarns aid with moisture management, wicking away excess moisture from the foot to keep you more comfortable during workout & training sessions. Mesh zones are strategically placed on the top of the foot to aid ventilation & breathability. Designed with the Runner in Mind The Letho Trainer Sock has been designed by runners, for runners. The heel & toe has been reinforced to enhance durability, with a hand linked toe seam adding comfort in sensitive areas & to prevent blisters. Arch support zones & Y-stitched heels offer a supportive fit, while shaped anti-stress cuffs allow freedom of movement where you need it most.