Bison 3.3m Aluminium DeckThis is the little brother of the Bison 3. 9m and Bison 4. 2m sharing the same fittings as the 2. 7m Aluminium deck and the 3. 9m they are the best quality air RIBs we have ever sold. Built to an amazingly high standard using high quality 1100 denier polyester PVC, the drop stich inflatable deck and inflatable keel is light weight and quick to inflate making it an excellent alternative to a RIB with the ability to deflate and stow in a locker or