The Under Armour Raid t-shirts have a next-to-skin fitted feel without the squeeze. HeatGear® fabric is ultra-soft and smooth for extreme comfort with very little weight. Stretch-mesh underarm and back panels deliver strategic ventilation and the 4-way stretch fabrication allows greater mobility in any direction. The moisture transport system wicks away sweat and dries fast. Anti-odor technology prevents the growth of odor causing microbes.