Under Armour Men's UA Army Of 11 Crew Socks X-Large Graphite Polyester/Nylon/Elastane Moisture Transport System wicks sweat away from the body ArmourBlock Anti-Odor technology prevents the growth of odor causing microbes Embedded arch support reduces foot fatigue Seamless toe and contoured "Y" heel for the perfect, comfortable fit XL: Men's 13-16