The Sportubes Series 3 Snowboard Tube is made of a high-density polyethylene shell. The Sportubes SIPLE pairs of skis with riser binding plates while traveling by plane, train, automobile or shipping lightweight while being strong and durable. Buy your Sportubes Series 3 Snowboard Tube today! The best 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 every day. 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.