Product DNA What's It Do? UA Compression gives your muscles that extra boost they need when you're working hard. But you know what else it does? It makes you feel near invincible. It brings you much closer to becoming what you want to be, every time you work out or compete. This is Under Armour® Transform Yourself: the baselayer built for heroic performance. The Fundamentals Compression: Ultra-tight, second skin fit Smooth, light HeatGear® Sonic fabric provides comfort and compression without restriction 4-way stretch fabrication allows greater mobility and maintains shape Signature Moisture Transport System wicks sweat away from the body UPF 30+ protects your skin from the sun's harmful rays Smooth, chafe-free flatlock seam construction 140g Polyester/Elastane Superman, Batman are property of ©DC Comics Spider-Man, Captain America are property of ©Marvel