If you are looking for the best quality Merino sock that you can find, here it is. The Mid length Yeti Merino sock from Feeet is a high quality Merino Boot length sock, designed for cold weather and harsh temperatures. Offering amazing comfort and warmth. 33% Merino Wool For warmth and comfort 15% Cordura polymide for strength 15% Polypropylene 2% Nylon 2% elastane 2% Nylon 2% elastane S/M 4 to 8 L/XL 8.5 to 12 Total weight 110g