A Rigid Inflatable Boat (RIB) and a Rigid Cabin Inflatable is a type of boat that is designed and built with a rigid hull and flexible upper tubes, which are usually filled with air. The hull is made of fibreglass or aluminium, while the air-filled tubes are often made from synthetic rubber. This boat type is highly popular due to the combination of a robust, durable hull made from a rigid material and the cushioning offered by the inflatable components. The boat is also typically lightweight and fast, making it ideal for water sports, fishing, and cruising activities.