Nike Pro Big Kids' (Boys') Training Shorts Fabric: Body: Dri-FIT 90% polyester/10% spandex. Mesh: Dri-FIT 92% polyester/8% spandex. Dri-FIT fabric helps keep you dry and comfortable Compression fit for support and comfort Strategically placed mesh offers excellent breathability Ergonomic seams for enhanced range of motion Flat seams move smoothly against your skin