These Under Armour Men's Shorts are Heat Gear and are Loose Fit to for Durability and Comfort. Armour is the first thing you put on & the last thing you take off, every time you workout or compete. HeatGear fabric, with all the benefits of UA Compression, Comfortable enough to be worn all day Under Armour's mission is to make all athletes better through passion, design and the relentless pursuit of innovation.