RF welded seams for expedition quality construction.Heavy-duty polyurethane laminated nylon material is UV-resistant, waterproof and durable.Watershed bags are 100% waterproof and submersible featuring the airtight, ZipDry seal.Expedition grade hardware and mil-spec stitching reinforcements enhance durability.Compression straps offer custom sizing.Long inflate/deflate tube for easy buoyancy control.Named after the Futaleufu, a popular river in Chile.Made in the USA.