NIKE Men's 9" Distance Running Short Body: Dri-FIT 100% polyester. Mesh/briefs: Dri-FIT 100% recycled polyester. Imported Machine Wash Stretch Dri-FIT fabric helps keep you dry and comfortable. Built-in briefs enhance support and coverage. Zippered pocket on back-right hip secures your small items. Long 9" inseam offers range of motion with great coverage.