A heat-formed rigid shell to protect the most fragile diving gear.Light weight for a 90L semi-rigid bag:under 4 kg.Ideally, put the most fragile items, such as the regulator, the diving computer and the buoyancy compensator in the bottom of the bag, then put the wetsuit on top of them. The side and front pockets are insulated with a watertight component. Ideal for storing your papers and diving log book.