The Sportube Series 3 Multi-Snowsport Tube uses a high density polyethylene shell that protects MULTIPLE pairs of skis with riser binding plates while traveling by plane, train, automobile or shipping via FedEx/UPS etc. It is designed to be lightweight while being strong and durable. Sportube's biggest and most versatile case, the Series 3 Sportube is the go to case for trips with family and friends when you want to consolidate your gear into one Sportube. Originally designed to hold two snowboards with boots and bindings, our customers find new uses for the Series 3 everyday. Hard plastic shell protects your equipment whether traveling by plane, train, automobile or shipping via FedEx / UPS. Sportube cases are lightweight while being strong and durable.