Men's - Women's Hiking Ultra Lite Crew Socks (also can function as a liner sock) Fiber Contents: 77% Exclusive THORWICK COOL, 16% stretch nylon, 7% spandex Made in US Care instructions: For longer product life, maximum protection and comfort, wash and dry inside out (to fluff up the pads) using liquid fabric softener after each use (to lubricate the fibers for longer life). For optimal benefits, liquid fabric softeners are always recommended. Do Not Bleach. Wash Normal: 105F/40C. Dry Normal Medium. Do Not Dry Clean. Do Not Iron. Style: ULHX / Padding Level: Thin Cushion Key Benefit: Thorlos Protection = Comfort Guarantee - Your feet will feel better or your money back! Proudly MADE in the USA | North Carolina Fiber Contents: 77% Exclusive THORWICK COOL, 16% stretch nylon, 7% spandex