Constructed of 30% wool, 38% polypropylene, 23% stretch nylon, 8% Merino wool, and 1% Lycra spandex. Specially structured to remove moisture. Features a "no-feel" seam in the toe, reinforced heel and toe areas, and a Lycra spandex panel for arch support. And fabric-tested to ensure wear-resistance.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.