Thorlos Unisex LTH Light Hiking Thick Padded Crew Sock 62% Exclusive THORWICK, 19% THORLON, 14% stretch nylon, 5% 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. Padding Level: Moderate Cushion Key Benefit: Thorlos Protection = Maximum Comfort Guarantee - Your feet will feel better or your money back! Proudly MADE in the USA | North Carolina Thorlos clinically-tested padding under the ball and heel provides maximum protection from friction, the primary cause of blisters, and impact protection where needed most Constructed with THORLON blended with THORWICK COOL fibers for superior softness, resilience, durability and extra moisture-wicking for drier, cooler, better feeling feet. Cushioned instep and arch for a better fit, more support and less pressure on the feet for a more comfortable day hike Low profile toe seam wont rub or irritate the feet Ventilation panel for extra moisture control and breathability