Under Armour Men's Freedom HeatGear Armour Short Sleeve Compression Shirt 84% Polyester/16% Elastane Imported Through UA Freedom we are committed to a minimum donation of $250,000 annually to support First Responders, Military Personnel, Law Enforcement Officers & Veterans 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