The Under Armour Heat Gear t-shirt is a tight fitting garment that Sits close to the skin for a streamlined fit without the squeeze of compression. Constructed from HeatGear® Sonic fabric, this material is ultra-soft and smooth for extreme comfort with very little weight. ArmourVent mesh panels help deliver true breathability in a light, stretchy, durable, fast-drying fabric with a 4-way stretch fabrication, that allows greater mobility and maintains shape. Treated with a Moisture Transport System, this wicks sweat away from the body to keep it cool and fresh for a smelly free top due to Anti-odor technology that prevents the growth of odor causing microbes.