Elevate your performance with Under Armour – where innovation meets athleticism. Explore cutting-edge sportswear, footwear, and accessories designed to empower your journey. Experience the next level of fitness with Under Armour.ColdGear Infrared technology holds in body heat, without adding weight or bulk. It's a special, soft print on the inside and it keeps you warmer, longer, so you can work out in the bitter cold.