The Under Armour Vanish Energy Short Sleeve T-Shirt is designed for performance. It's lightweight, extra stretchy, breathable, and fast-drying to keep you comfortable and focused during workouts. The UA RUSH™ technology uses infrared to reflect your body's energy, aiding in performance and recovery. Features include moisture-wicking fabric, 4-way stretch for better movement, a side vent hem, and odor control technology to minimize unwanted smells. Made with Polyester.