This Storm Streamline 3 ball roller bag is made of 600D Denier Polyvinyl Fabric. The 4" bearing wheels provide stability and better mobility by riding on a forged steel axle. Heavy duty construction allows the Storm Streamline 3 roller to perform smoothly under heavy weight and sturdy telescoping handle provides excellent mobility. With abundant storage capabilities and a shoe compartment that accepts up to U.S men's size 15, theres no way to go wrong.