Boys’ Nike Flex Ace Tennis Shorts are a lightweight design made of Nike Flex fabric that stretches with your body as you move. Its mesh-lined waistband and perforated side panels provide a breathable and comfortable fit on the court. Nike Flex fabric stretches with your body. Elastic waistband with mesh lining for breathable comfort. Laser perforations at side panels enhance ventilation. Side pockets comfortably store tennis balls.