Medium-weight FoxSox take all your duty can dish out; extra cushioning softens the blows your feet take every day, quick-dry fibers make washing a simple task, superb fit minimizes bunching and blistering. Scentry helps permanently defend your socks from odor; natural and man-made agents make this technology a sure way to be confident about sock odor, embedded fiber like silver or copper or with a micropolymer silane technology which slows wear and reduces odor in the sock. URfit System provides the ultimate personalized response fit combining memory knit compression, a contoured rib top and spandex compression zones. Our exclusive technology quickly draws moisture away from your skin so your feet stay dry and comfortable; removes any moisture build up which reduces hot spots and friction that causes blisters. Fox River products are guaranteed against manufacturing defects for one year; products may be returned within one year with the dated receipt to the store where you purchased them or by following our FoxSox.com return process. Mens 9-11.5; Womens 10-12.570% polypropylene, 28% nylon, 2% spandex