Nail your bod goals in this women's HeatGear Armour Racer Vest from Under Armour. Lightweight, stretchy and built to keep you cool, UA's Moisture Transport System wicks sweat away from the skin, while the racerback fit keeps you moving without restrictions. Flatlock seams reduce chafing and irritation, perfect for focused, distraction-free sessions.. Material: 90% Polyester/10% Elastane