Compression: Ultra-tight, second skin fit. HeatGear® fabric, with all the benefits of UA Compression, comfortable enough to be worn all day 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 UPF 30+ protects your skin from the sun's harmful rays Smooth, chafe-free flatlock seam construction Allover sublimated print 5.0 oz. Polyester/Elastane