More Bag For Your Buck! This Storm Streamline 2 bowling bag possess the high quality of Storm products at an affordable price. This two ball roller bag is made of 600 Denier Polyvinyl Fabric. The super wide wheels and heavy duty construction allows the Storm Streamline 2 roller to perform smoothly under heavy weight. With abundant storage capabilities and a shoe compartment tha accepts up to U.S men's size 15.