Fit: Compression--Supports your muscles to prevent fatigue during intense training. * Fabric Type: Mesh--A knit or woven fabric with small, evenly spaced holes * Performance Technology: Under Armour® HeatGear® --For when it"s hot. HeatGear® technology wicks perspiration off your skin, rather than absorbing it. It"s engineered with UA"s Moisture Transport System to deliver core temperature regulation and maximum breathability. * Anti-Microbial--Anti-microbial treatments provide permanent odor protection by inhibiting the growth of bacteria and mildew in the fabric. * Ventilation--Mesh or breathable fabric inserts in high heat zones allow sweat to evaporate and cool air to circulate.