Constructed of 88% worsted wool, 10% stretch nylon, 1% hi-bulk acrylic and 1% Lycra spandex. Features a Lycra-reinforced welt top, fully cushioned toe and sole, flat toe seam, and reinforced heel and toes. A boot-height sock that's ready to handle plenty of hard work and cold weather.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.