Made with a blend of 77% Merino wool, 20% stretch nylon, 2% hi-bulk acrylic and 1% Lycra spandex. A boot-height sock with a Lycra-reinforced top, flat tow seams, and reinforced heel and toes. A great all-purpose cold weather work sock -- soft, warm, and fabric-tested for long wear.For over 115 years, Carhartt has manufactured premium workwear known for exceptional durability, comfort, quality of construction, and fit that you can feel in the fabrics and see in the performance.