Stay toasty in Peakheat Medium Weight Crew Work Socks! Made with a unique blend of Merino wool and Thermolite®, these socks are sure to keep your feet warm and comfortable in any temperature. Plus, their durable construction ensures your feet stay warm for longer. Unisex fit Reinforced Heel/Toe Shock Absorption Comfort Toe Seam Arch Support Breathable Mesh Moisture Wicking Memory Knit 39% Merino wool, 32% Nylon, 22% Thermolite®, 5% polyester, 2% spandex Style 6631