Athalon Luggage The Glider-21 Inch Carry-On Duffel Backpack, Grass Green, One Size The glider has tons of functions Backpack: can be carried in a north/south direction with its hide-away backpack straps As a backpack, the design distributes heavy weight, and gives maximum comfort while lightening the heaviest cargo Carry-all: can be carried horizontally and comes with detachable shoulder strap Top and side ergonomic handles give lots of versatile carrying options