To improve your strength and endurance train in this Under Armour UA Rush S/S Training T-Shirt in Black. This tee has been crafted so that the mineral-infused fabric absorbs the energy your body emits and reflects it back into your tissues and muscles. That means your muscles can work harder and you get better. Designed with a next-to-skin the top is comfortable but comes without the squeeze. * Mesh insets on side hem for added breathability * Modified raglan sleeve & low profile collar construction * Powered by Celliant * Body: 82% Polyester & 18% Elastane * Mesh Panels: 90% Polyester & 10% Elastane