Heys Luggage Fuse X3 Luggage Set, Green, One Size The best of both worlds - the revolutionary design of the fuse x3 makes this the worlds lightest hybrid luggage. the combination of materials allows this luggage to have the strength and support of hard-side luggage with the convenience and functionality of soft-side luggage Its patent-pending structural design allows the luggage to be completely frameless with all its support coming from the unique skeleton abs frame. this allows fuse x3 to be extremely lightweight, weighing just half the weight of most traditional luggage The fuse x3 utilizes smooth gliding, in-line skate wheels The fuse x3 has 2 external pockets and 4 internal compartments The fuse x3 has a unique, anti-tip-over expansion system