Under Armour HeatGear is a proprietary technology used in a variety of apparel, footwear, and gear designed to keep athletes cool and dry in hot weather and conditions. It is a lightweight fabric that is ideal for wear in hot conditions, recommended for 75°F and up. HeatGear is designed to wick sweat away from the wearers body and filter it through the material, where it is then evaporated. This moisture-wicking material helps athletes stay cool and dry, whether they are on a sweltering outdoor run or working out in the gym. HeatGear is also constructed to be highly breathable and quick-drying, helping athletes stay as comfortable as possible in otherwise unbearable conditions. Under Armour also has a variation of HeatGear called "Iso-Chill," which feels cooler to the touch and pulls heat away from the skin. HeatGear is a great choice for athletes looking to stay fit in the summer weather, and it is used in a variety of Under Armour products, including compression training gear and comfortable game-day apparel.