Durable olive drab backpack, practical design with adjustable straps and multiple pockets. Used item. Used for training. The material is strong, so it's perfectly fine for outdoor use. - Color: Olive Drab - Design: Backpack style - Number of pockets: Multiple external pockets - Straps: Adjustable shoulder straps - Features: Compatible with modular systems Three pockets on the outside top (holds a 350ml can) Three pockets on the bottom (holds two 500ml PET bottles, three in the center) There's also a large pocket inside when you lift the top. (Tablet size, wide enough for books and bills) As you can see, it's quite large and can be rolled up. I think it's 50-60L. I put a whole blanket in it for the photo. You can also tie about 20kg of items to the outside belts. (Proven ability to climb mountains with a folding bicycle tied to it.) The carrier and the backpack can be separated. You can also use the carrier alone. There's a part to widen the bottom of the carrier. (Black color) Thank you for looking.