Developed to transfer moisture and heat from the surface of the feet. The technical All Season sock is durable, suitable for year-round use and recommended for use in ankle boots, ankle boots and, for example, GORE-TEX® footwear. ESD approved. Merino wool is Mulesing-free. Materials: 48% Polyamide, 34% Merino Wool, 14% Polypropylene, 2% Elastane and 2% Carbon Fiber.