Under Armour 2016 HeatGear&reg; Armour Printed Vest Mens Training Sports Tank Top HeatGear fabric, with all the benefits of UA Compression, comfortable enough to be worn all day Stretch-mesh underarm panels deliver strategic ventilation 4-way stretch fabrication allows greater mobility in any direction Moisture Transport System wicks sweat & dries fast Anti-odor technology prevents the growth of odor causing microbes Mesh panel on back neck with ARMOUR wordmark Body: 5.0 oz. Polyester/Elastane Mesh: 4.6 oz. Polyester/Elastane UPF 30+ protects your skin from the sun's harmful rays Compression: Ultra-tight, second skin fit.