The Intex® Aqua River Run inflatable tube is designed to fit an adult and it's perfect for tubing down the river, in the lake, or in the pool. The River Run™ tube is designed for high-performance fun. The bottom of the tube has a mesh layer where the water keeps you cool in the sun. The cup holders and backrest are added comforts on the water. The 18-gauge (0.46mm) vinyl material is durable and cool to the touch.