The sleek Maravia Zephyr is a larger version of the Diablo, or a
diminishing tube version of the Williwaw 1.5.The tubes diminish in diameter from 21" in the straight side sections down to 16" in the bow and stern. This design provides more inside space for gear and people in the bow and stern, and is also an advantage when you encounter those upstream canyon winds in the afternoon.
At 15 feet long and 7 feet wide, this is a great size raft if your normal trips are overnight and your load is 3-4 people and gear.
The Zephyr comes standard with self-bailing floor that lets this raft
perform, even with a load. Priced here with two thwarts, but has
attachments for four.