Undershirt Under Armour Hg Racer Tank. Women's fitted-cut vest in an extremely breathable fabric. Small holes in the fabric provide breathability without being transparent. The material used removes moisture and prevents odour. 4-way stretch technology allows for greater mobility of clothing in any direction. Reverse-directed seams for maximum comfort of your skin. Contoured hem provides better coverage. Technology: Moisture Transport System (Wicks sweat away from your body to the surface of your clothes, which makes it easier to dry and keeps you longer), Anti-Odor (keeps the upper fresh by preventing the growth of odor-causing bacteria), HeatGear (unique highly breathable material, Fast sweat), 4-Way Stretch (a lightweight construction that stretches in both transverse and vertical directions to increase mobility and accelerate drying). Material: 94% Polyester, 6% elastane