The Nike Flex Shorts are made to keep you moving during high-intensity training. Nike Flex fabric stretches with every move, while vents at the hems are ideal for deep bends like lunges and squats. This product is made with at least 50% recycled polyester fibers. Natural Movement Nike Flex fabric stretches with your body, helping you get the most out of your performance—without getting in your way. Hem vents let you move freely through squats and lunges. Sweat-Wicking Power Dri-FIT technology moves sweat from your skin for quicker evaporation to help you stay dry and comfortable.