UA RUSH™ Short Sleeve shirt Large Grayish Purple 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. DNA As your body emits energy, the mineral-infused fabric absorbs & reflects it back into tissues & muscles, improving endurance & strength Strategic mesh paneling on collar for added breathability & comfort