No wasted energy, only more gains. The mineral-infused fabric takes the energy you give off when you work and reflects it back into your muscles, increasing blood flow and helping them to work harder. Fitted: Next-to-skin without the squeeze As your body emits energy, the mineral-infused fabric absorbs & reflects it back, improving endurance Mesh insets on sleeves & side hem for added breathability Modified raglan sleeve & low profile collar construction Powered by Celliant Body: 82% Polyester18% Elastane Mesh Panels: 90% Polyester/10% Elastane