Nike flex vent shortstrain in versatile comfort in these nike flex vent training shorts these shorts perforated back hem enhances breathability while the nike flex fabric stretches with your body for optimal range of motion during your workout featuresmaterial 84 polyester 16 spandexnike flex fabric stretches with you for optimal range of motionmotion vents at the side enhance ease of movementperforated back hem enhances ventilation8 inseam hits just above the kneeside pockets provide con