Sea to Summit Pack Converter/Duffel Two carry handles, internally reinforced Use on its own as a lightweight duffel Tough, waterproof 210D rip stop All seams tape sealed. Contoured to fit internal frame packs Medium: 34" x 13" x 11". Large: 36" x 14" x 13". Two carry handles, internally reinforced plus removable shoulder strap Tough, waterproof 210D rip stop nylon All seams tape sealed A duffel bag for checking a backpack as luggage Added security when traveling through airports and train stations Contoured to fit internal frame packs Reccomended to be used for flying