24" Large Cross Trek Duffel Bag in Gray and Black Gym Bag MATERIAL: 600D Polyester w/ Rip-stop Nylon. SIZE: 24" x 13" x10-1/2". FEATURE: Features: Large zippered main compartment, zippered front pocket, rear elastic holder w/four corner water drainage and adjustable/detachable shoulder strap. COLORS: Gray/Black.