These lightweight hiking socks combine natural and synthetic fibers to keep your feet dry, warm, and comfortable in an ever-changing environment. Rolled top yields a snug yet nonbinding fit. Reinforced foot bottom for added durability. Arch support helps reduce fatigue. Seamless toe closure eliminates irritation on toes. 58% merino wool, 35% stretch nylon, 6% polyester, 1% spandex construction. Made in the USA. Sizes: M (M: 5-9 / W: 6-10); L (M: 9-12 / W: 10-12); XL (M: 12-15).