4 person open deck towable with side wings. When you step onto the dock with a Nitro 4, this much is clear: it''s you against the boat. If you think your team is up to the task, the Aquaglide Nitro 4 Inflatable Towable Tube is your weapon of choice. Nitro means pure adrenaline-pumping action and high performance. Built-in side wings keep the crew in control no matter how extreme the whip or how high the air.