78% Nylon, 22% polyester 【ULTRA AIR-PERMEABILITY AND MOISTURE WICKING PERFORMANCE?—78% Nylon, 22% polyester.Breathable, comfortable to keep your feet dry and odor free throughout the day. 【PREMIUM QUALITY & LONG LASTING?—Our ankle socks won’t fall apart or stretch out after a few washes that stay intact and washer friendly. Abrasion resistant, strong and colorfast 【PERFECT US SIZES?– – S/M : Men 5-8 US; Women 6-9 US. L/XL : Men 8.5-11 US; Women 9.5-12 US. Good matching for all of your favorite athletic shoes, running shoes, climbing shoes, boat shoes, jogging shoes,etc 【FOUR SEASONS & ALL SPORTS? – Our ultra wicking fibers allows these no show socks to maintain cool temparature during summer and keep them dry while maintaining body temparature during winters making them All Weather Perfect Running Socks for Women and Men. Professionally customized for all sports, mountain climbing, football, hiking, running, tennis, marathon, hockey, soccer, basketball, golf, cycling, etc 【WHAT YOU GET? – 6 Pairs men’s & women’s athletic socks and lifetime quality assurance. Return them for 100% Money Back, No Questions Asked.