Nike Swift Flex Running Trousers Black Camouflage Pants Medium Motivated by the need for warm-up trousers that he wouldn't need to take off, American distance runner Galen Rupp provided feedback for Nike Swift Men's Running Trousers. Relaxed through the thighs and slim below the knees, they perform from start to finish. Nike Flex fabric stretches with your body. Standard fit through the thighs and slim fit through the calves create a secure, yet free feel. Pocket on the back-right hip has a locking zip that can securely store a media device. It has a vapour barrier to help guard items from sweat. Reflective details help you stand out from the crowd. Zip side pockets Fabric: Body: 80% polyester/20% elastane. Panels: 85% polyester/15% elastane. Machine wash