All of our rafts feature 1200 denier on both the floor and the tubes. The floor wraps around the side tube and is raised 5 inches to reduce abrasion and increase maneuverability . A "V" hinge has also been added between the floor and the tube to keep sand from abrading the tubes. Heavy-duty Hypalon and Neoprene skid plates have been added to both the top and the bottom of the tube to dramatically increase tube life. ( View cross section ) All models have 6 chambers, 6 "D" rings and molded neoprene rub stakes. We have also added molded neoprene handles at each end to make loading and unloading more convenient. The Hypalon material contains 60% Hypalon and is recognized for it's superior strength and durability. The quality, durability and price these rafts offer is an excellent value.