These Merino wool thermal socks stand up to cold-climate duty, keeping your feet warm and comfortable. Secure fit means no bunching in the bottom of your boot, minimizing blisters. Our exclusive Wick Dry™ technology manages moisture and keeps feet dry. Relaxed stretch upper ribbing helps prevent muscle pinching Cushioned shin for extra padding against boot lacing Spandex compression arch holds form and provides support Reinforced toe and heel add durability and longer sock life Smooth, flat comfort toe seam 40% Merino wool, 40% acrylic, 18% nylon, 2% spandex