Material: Lining: 80% Nylon, 20% Elastane.Body: 90% Nylon, 10% Elastane.Elastic closure ,Breathable & soft fabric ，Stay comfortable and unbundled.Double Layer design,Inner layer provide elastic support and protective coverage; Outer layer side split design offer breathability and wider range of motion.Phone Pocket: The built-in liner with a elastic phone pocket on the right can hold plus phone properly, free your hands when workout.Back pocket with zipper allows you to use them for any activities without fear of the keys or cards in your pocket falling out.Elastic Waistband: Wide and Soft elastic waistband fits comfortably without falling down, perfect for running, workout, exercise, gym, fitness, jogging.