These wide calf crew socks have 40% more stretch than ordinary socks for a comfortable, non-binding fit. Soft seam won't rub or irritate toes. Acrylic footbed helps keep feed dry and healthy. Reinforced toe and heel for durability. Acrylic/Nylon/Lycra®. Made in the USA. Sizes MD (Women's 5½ - 9½, Men's 5-8), LG (Women's 10+, Men's 8½ - 12).