O'Brien 2-U 2 Rider Tube The O'Brien 2-U 2 Rider Tube is the ideal tube for you and a friend to enjoy a day out on the water. Fashioned from 30 gage PVC and fully covered with 840 D nylon, the tube is designed for durability and long-lasting use. The 12 handles with EVA knuckle guards are there to keep you safe and secure when you're riding the waves. It is easily towable for more fun activities. Equipped with a Boston valve, which is a one-way valve with two caps, inflating and deflating this tube is an easy and hassle-free process. Measuring 60 in. x 84 in., the tube is large enough for two people to ride comfortably. With the O'Brien 2-U 2 Rider Tube, you're fully equipped for any water adventure!