The high-pressure air tubes are only at the side. At the bottom the scubi 2 has a continuous keel with a steem in bow and stern. For more stiffness, there are four small cross ribs under the comfortable seat construction. Just take your scubi 2 with you wherever you go. No big packages, no problem with carrying the boat with you. Is is packed in one backpack and has a weight of only 18 kg. Optional accessories are 2-Person and Solo-Deck as well as a rudder system.