This is a product from Navy Company, used about twice. Retail price: 15,800 yen Completely dry backpack Since not a single drop of water will fall, you can put it in the car as is. When going on an expedition, you can check it in on a plane with all your gear inside. The length of the bag can be adjusted from 70cm to 130cm by tightening it. There are pads on the shoulder straps, so it won't hurt even if you put heavy items in it. Navy Company Dry All Backpack Spearfishing Harpoon fishing