Intex Mariner 4 Review: Inflatable Boat Overview.

The Intex Mariner 4 is designed for getting out and enjoying the water—whether that’s fishing on a lake, floating down a river, or exploring the ocean. It does well on rivers that don’t have many sharp rocks or intense rapids. Intex Mariner 4, 4-Person Inflatable Boat Set Description The Intex Mariner 4 inflatable boat is constructed for supreme strength and durability with Super Tough PVC. This material is comprised of three separate layers - two outer layers of heavy-gauge PVC laminated to an inner layer of polyester mesh for extra reinforcement.