The tuna bag has a rigid bottom, thanks to the structure that supports the rubber and anti-breakage wheels. It is designed to carry diving equipment more comfortably. The material is water-repellent, even if not watertight. All metal components are made of rustproof stainless steel. The capacity is 120 liters. It is equipped with a large internal mesh pocket with a zipper and a small external pocket with a zipper. Three inner straps are attached to the bottom of the structure to secure the equipment. At the top end, there is a handle for towing and another handle is at the bottom end. In the middle of the bag, two more handles can be joined with a padded strap.