Run it down the Grand Canyon. Motor it up the Amazon. Put a moose on it and row it through Alaska. Build a shack on it and drift the Mississippi. The 18' NRS Kodiak Cataraft is as big as your plans. Please note that the frame is sold separately from the cataraft tubes NRS "cats" are designed for extraordinary performance, agility and stability, whether transporting passengers and gear or sport boating. Precisely sized continuous-curve tubes enhance capacity, ride and maneuverability. 28" tube diameters give you more cargo capacity than you'll ever need. Extended wear patches on the tops of the tubes allow for frames up to 12' long. Heavy-duty Pennel OrcaA(R) material is super abrasion, chemical and UV-resistant for unmatched durability. Trouble-free Leafield(TM) C7 Valves ensure easy inflation/deflation of the tubes. 16 2" stainless steel D-rings provide a bombproof anchor system for your frame. Three air chambers in each tube give you maximum security in emergency situations. 10-year retail warranty, 6-year commercial. Repair kit included.