The Under Armour UA Launch Runsie in black is designed for comfort and performance. It features a secure zip center back pocket, keyhole cutouts for ventilation and easy on-off, and 4-way stretch material for freedom of movement. The fitted upper body is lined with mesh for ultimate comfort, while the loose woven shorts with an inner brief are lightweight and durable. This runsie is made from a super-soft and stretchy performance knit fabric that offers support during runs. Material composition: 75% Polyester, 25% Elastane. Reference number: 1383961001.