A Prizm often has a triangular base, used for dispersing light into a spectrum! This quick, nimble and ultralight performance "trick" tube that provides all day action! The Prism tube is easily towed by all types of watercraft, and features a rear boarding strap, low profile design for easy rider boarding and high maneuverability. This tube is ready for action with a Skim-Fast™ bottom that responds quickly to wakes and waves, creating a dynamic and exciting ride!