Made from soft Merino wool, these classic-inspired, lightweight, durable socks absorb moisture and keep you comfortable in many temperatures. Special knitting stops bunching and extends sock life. Fox River's URfit??? System provides long-lasting arch support and memory-knit construction for any adventure. Vented panels remove moisture and keep you dry. Reinforced toe and heel add comfort and longer sock life. Cushioned sole and toe absorb shocks and insulate. Smooth, flat comfort toe seam. 36% Merino wool, 36% acrylic, 26% nylon, 2% spandex. Lightweight.