100% deadstock nylon & polyester 35L (2135cu in) 22 x 12 x 10in (56 x 30 x 25cm) 2 lb 7 oz (1.1kg) It's just a hair bigger than my Osprey Porter 30, which is what I wanted. I love the clamshell layout and how it fits under any airline seat. Got a great deal from Mountain High when it was on sale. I will definitely be buying from them again. I’ve only used this bag for a walk around town. So far, so good. I love the color combos I got. Yay! I am looking forward to a trip, so I can really try out this bag. I love that there are lots of pockets, and they seem to be made with thought for function. It's such a nice-looking bag! Shipping time was good. The bag arrived well. Wished it had side pockets for a water bottle. Then it would be a 10. Otherwise great pack . LOVE this bag. Made my month long trip around Spain a breeze. Definitely recommend! Clamshell style, has plenty of pockets and compartments. This is great for an overnight to max 3 night stay if you pack well. The 35L i found to be just a bit too big. Too bad Cotopaxi doesn't make one that is 32L instead. Either way, great styling and comfortable straps. It is a bit more expensive, but you get what you pay for. I really did wish this has a sports bottle strap. Straps on 3 sides would be enough.