The Under Armour HeatGear Flyweight Running Short is made with an ultra-lightweight woven fabric that won’t hold you down, but remains durable for heavy use. Perforated side panels and back waist provide added ventilation where you need it most. Internal mesh liner helps moisture escape, keeping you cool and dry. Anti-odor technology keeps the fabric fresh. Back pocket provides ample room to store gels and other necessities, internal waist key pocket for house keys or I.D. Reflective UA logo boosts visibility and safety during low light runs. HeatGear® works best in weather between 75-100 degrees. 5" inseam. 100% polyester. Imported.