Armour is the first thing you put on the last thing you take off every time you work out or compete the fundamentals compression ultra tight second skin fit heatgear fabric with all the benefits of ua compression comfortable enough to be worn all daystretch mesh underarm panels deliver strategic ventilationupf 30 protects your skin from the suns harmful rays4 way stretch fabrication allows greater mobility in any directionmoisture transport system wicks sweat away from the bodyan