The KLIM Solstice Sock 2.0 is a versatile, midweight women&';s riding sock designed to wick moisture and keep your feet comfortable in a range of winter temperatures. Made of a Teton Merino Wool blend, these durable socks enhance the performance of KLIM&';s waterproof, breathable footwear to keep you comfortable in various riding conditions. Great for riders who want a little extra warmth without significant bulk. Teton Merino Wool blended w/ acrylic, Polyamide Nylon, Lycra for durability & comfort (36% Merino Wool, 31% Acrylic, 11% Nylon, 22% Elastane) Made of European sourced yarns Reinforced toe, heel, sole Engineered Terry Loop for strategic cushioning and warmth Arch & ankle support stretch bands Patterned front mid ankle bend for reduced bulk Tubular cuff for better fit & stretch recovery Over-the-calf height SM = 5-6, MD = 7-9, LG = 10-12