Part of Osprey’s commuter line, the nylon-and-pack cloth Spin 22 (the number denotes a 22-liter capacity) is a trim pack that sits lightly on your back thanks to a mesh panel that allows ventilation between your torso and your cargo. It has a low profile shape, which makes it easier to check for traffic behind you. If you commute to a relatively casual office, this brightly colored pack will fit right in. Open the flap, and there’s a padded sleeve for your 15-inch laptop. In front of that is another large-ish compartment that hold other essentials. Although the pack has side-zip gussets that allow it to expand, if you are like me and commute with an outfit and toiletries, you will want to size up to the Spin 32: The 22 will hold flats and a tunic dress, and maybe one of those small, superabsorbent towels, but not much more. On the other hand, if you ride in your work clothes and only carry a laptop and lunch, you will be content. And organized: There are pockets of various sizes and pockets within pockets, so it’s possible to designate a place for your power cords, your phone, your wallet, pens, notebook, and so on. You’ll also find many tightening and clip-on options, reducing flapping and bulging but allowing a helmet or water bottle to hitch a ride. The closures are unique: The main flap doesn’t buckle, and instead features a wide plastic wedge that fits into loops spaced about an inch apart on the bottom of the outside—choose a lower loop for smaller loads, or an upper loop for larger ones. This system holds the pack shut securely, and is easier to open and fasten than a buckle. The zipper pulls are loops; and I once caught one on a drawer, with negative consequences. My only other quibble with the pack is the hook-and-loop fastener on the laptop sleeve: If I forgot to close it, it snagged almost any item I put in the front compartment.