Armour is the first thing you put on & the last thing you take off, every time you work out or compete. Compression: Ultra-tight, second skin fit HeatGear® fabric, with all the benefits of UA Compression, comfortable enough to be worn all day Stretch-mesh underarm panels deliver strategic ventilation UPF 30+ protects your skin from the sun's harmful rays 4-way stretch fabrication allows greater mobility in any direction Moisture Transport System wicks sweat away from the body Mesh panel on back neck with ARMOUR wordmark Body: 140g Polyester/Elastane Mesh: 130g Polyester/Elastane