The AIRE Tributary 13 HD whitewater raft has been a best seller for years. The 13 HD is the perfect size for those wanting a slightly smaller raft without losing versatility. It is a great choice for day trips on local runs, for low volume fishing floats, or for shorter multi-day trips like Westwater Canyon. Featuring an overall symmetrical shape with slightly diminishing tubes in both the bow and the stern, the 13 HD's design allows it to punch through waves easier than a raft with a larger bow and stern diameter. It also catches less wind on those blustery days on the flat water. Tributary rafts are constructed using the two-layer AIRECell system; a PVC outer skin and internal urethane bladders for superior air retention, abrasion resistance and durability. They are also easier to repair and maintain. All Tributary self-bailing rafts are equipped with two removable thwarts and a pre-laced self bailing floor. The Tributary line of rafts and kayaks offers tremendous value for paddlers on a budget.