Durable, lightweight socks for warm weather. Features 36\% Merino Wool with a lightweight, ventilated design for moisture management. Ideal for warm weather, high-output activities. Includes arch compression and cushioned heel & toe. 36\% Merino wool, 33\% UltraSpun Polyester, 23\% nylon, 5\% polyester, 3\% LYCRA spandex.