SWEAT-WICKING AND SUPPORTIVE: The Nike Pro Core 5" Compression Boys' Shorts feature strategically placed mesh and sweat-wicking fabric for a supportive fit and breathability. BENEFITS: Dri-FIT fabric to wick away sweat and help keep you dry and comfortable. Mesh panels at the gusset for enhanced breathability. Stretch waist for a snug, athletic fit. PRODUCT DETAILS: 5" inseam based on size medium. Fabric: Body: Dri-FIT 90% polyester/10% spandex. Mesh: Dri-FIT 91% polyester/9% spandex.