No wasted energy, only more gains. UA RUSH™ uses a mineral-infused fabric to take the energy you give off when you work and reflect it back into your muscles, increasing blood flow and helping them work harder. As your body emits energy, the mineral-infused fabric absorbs & reflects it back, improving endurance. Tough, lightweight HeatGear® fabric, with all the performance benefits of UA Compression Mesh panels for added breathability. Strategic bonded seams eliminate irritation & chafing. Symmetrically placed graphics help to increase muscle awareness & balance. Body: 84% Polyester/16% Elastane Mesh: 90% Polyester/10% Elastane Shaped hem