This colourful, fun-yet-practical backpack is simply FANTASTIC!! Seriously, I don't know when I was last so very enthusiastic about something I'd bought - and especially not an add-on item that cost under a fiver! I'm a very active paraplegic whose job involves travel, and who competes in wheelchair tennis singles tournaments. So I use a rigid-frame, ultra-low-back sports wheelchair with a funky hot-pink frame and black upholstery. I needed a bag which would hang on my chair, but all the designated "wheelchair bags" offered on Amazon were dull black ones for much larger chairs, and require push-handles, which I don't have. On the other hand, the bag which IS made for sports chairs like mine by Quickie - who also make the chair - costs an eye-watering £80+, even without VAT! But this cheap, simple, yet sturdy, back-pack is ideal! The padded straps are easy to adjust to the shortest length, so that it hangs perfectly. I've currently got two large towels, my tennis shorts and two tees, shower gel, shampoo, a travel hairdryer, brushes, a paperback, a couple of apples, and six tennis balls in the main section; purse, phone, keys and driving licence in the front pocket; and a 500ml bottle of water in each of the mesh side pockets!! And it still isn't anything like over-stuffed!! I think it probably holds more than an expensive padded, and more structured one of a similar size would, precisely because of it's free-form. I don't need it to carry a lap-top, but it's true it might not offer much protection for anything like that. And I don't know how comfortable the unpadded structure would be if carried for long periods against one's back in the usual way. But these are so affordable, sturdy, and come in such a wide range of bright colours, they'd make great schoolbags. As I explained, I specially wanted the hot-pink shade for mine, but a warning to anybody else choosing the colour: the photo is deceptive - it truly is shocking-pink! Finally, to anyone reading this and wondering how on earth a back-pack can be offered at this ridiculously low price I'd say: don't hesitate, cos this is a quality piece of kit! Grab one while you can! :-)