Fox River Brocket Men`s Heavyweight Mid-calf Boot Socks, FR-2184, Large, Black 63% acrylic, 23% Merino/wool blend, 12% nylon, 2% spandex. Memory-knit contruction won`t sag or bunch. Insulated leg and sole are fully cushioned. Reinforced toe and heel add comfort and longer product life. Smooth, flat comfort toe seam. Made in the USA.