The Power Trekker is one of the most comfortable socks we sell due to its full cushion and unique combination of merino wool and combed cotton. Suitable for year-round wear due to its exceptional warmth, it fits into both boots and most running shoes, so they can be used for a number of outdoor activities. Once you’ve tried these socks, you won’t want to wear anything else!Soft, warm, and durable: Merino wool is a versatile fibre that wicks away moisture and keeps your feet dry, blister-free, and smelling great. Due to a lower micron width per strand, it is a finer type of wool without the itch.Content45% Merino Wool40% Combed Cotton15% NylonLarge (Men’s 8-12 Shoe / Women’s 913 Shoe)