Aosom's Enclosed Bicycle Cargo Trailer is a multi-use cargo trailer and pull cart in one. It converts easily from a lightweight bicycle trailer to a convenient pull cart and is ideal for on the go use when you're got something to haul or just want a reason to ride your bike around instead of driving. Tackle shopping trips or outings to the beach and back again with ease. Think of it as a trunk for your bicycle, offering the same kind of usefulness and protection from the elements.