Overheating will be the last of your worries with the Under Armour HeatGearŪ Fly-By Knit Short. This lightweight, all-over stretch mesh short delivers maximum ventillation, keeping you cool. The built-in brief liner is anti-microbial and offers extra protection for a chafe-free performance. A Moisture transport system helps wick away sweat to keep you dry and the reflective logo increases visibility in low light. This HeatGear short is best for weather between 75-100 degrees. 84% polyester/16% spandex. 3" inseam. Imported.