Eagle creek ec lync system 20 this ultra light international carry on convertible luggage completely collapses and the frame dissembles for easy storage in small stuff sac plus it has backpack straps so you can remove the frame or wear it as a wheeled backpack ec lync tm system packs all the durability that eagle creeks no matter what tm warranty promises and the innovation we demand features international carry on with removable adjustable breathable backpack straps with st