Details Low-cut sock sits just below the ankle for a clean, streamlined fit 4-season design - naturally moisture wicking and temperature regulating for year-round comfort Cushioned sole with reinforced heel and toe for trail-ready durability Spandex rib compression at arch and non-slip cuff for a secure, supportive fit Breathable construction keeps feet dry and comfortable mile after mile 38% Recycled Poly, 33% Nylon, 20% Merino Wool, 8% American Bison, 1% Spandex Machine wash cold, tumble dry low S/M fits women&';s 6-9, men&';s 5-8 M/L fits women&';s 10-12, men&';s 9-13 Covered by our Lifetime Guarantee Responsibly made in USA