The Under Armour Beyond III Crew Sock features Strategic Moisture Transport that wicks sweat away from the skin to the surface of the sock to keep your foot cool and comfortable. ArmourBlock prevents the growth of odor causing bacteria to keep the sock fresh and odor-free. Strategic Cushioning protects high impact areas of your foot during heel strike and toe off. Embedded Arch Support reduces foot fatigue. Seamless toe and contoured "Y" heel provide a comfortable fit. HeatGear® works best in weather between 75 and 100 degrees. 97% polyester/3% spandex. Imported.