The Sherpa Roller combines the convenience of a rolling bag with the adventure travel need for a backpack. This convertible travel bag features plenty of storage in the main compartment with handy side compression straps to keep your load compact. Additional storage can be found in the interior lid organizer pocket and a discreet interior security pocket. The Sherpa Roller travels on stable urethane wheels with a sturdy retractable handle, or if you need to go hands free, the zip-away backpack carry system with a chest harness and hip belt is easily accessible. The Sherpa Roller goes to the end of the road and keeps going. 3705 cubic inches (60 liters), 24 x 13 x 13in (61 x 33 x 33cm), 9 lbs. (4kg). Material: Polyester.