This thing is amazing! A 28 litre backpack with waist support, hydration compatible, , a large interior pocket, with divider, exterior stuff pocket, and top quick access. And the thing packs down to a 9 x 9 x 3.5in bag that comes with it, while weighing only about 1 lb 8 oz. Tough and durable, it's been with me often (and a little sad to see it go). Ive used it as a main pack or packed within a backpack for day trips, groceries, or day hikes. Also a great adventure gift! Here's a review https://packhacker.com/travel-gear/matador/beast28/ Brand new is almost 200, selling for 50