Under Armour Men's Infrared Logo Socks (L) Coldgear infrared uses a soft, thermal coated yarn on the inner layer of the sock to absorb and retain body heat, keeping you warmer longer. ArmourDry wicks moisture, accelerates evaporation Embedded Arch Support reduces foot fatigue ArmourBlock helps prevent the growth of odor-causing bacteria in the sock Size: Large/9-12.5