The Ozone 22″ is one of four bags in the new Ozone line released by Osprey. The line is based on an ultralight travel system, and the 22″ is the maximum legal carry-on size. This is the bag I’ve been using, and light it is. It weighs in at 4 lbs 7 oz which makes for a very light bag. Despite its weight, the bag has incredibly solid construction. It has a strong aluminum frame, a retractable handle, and large polyurethane wheels with sealed bearings. Loading the bag is quite easy due to the large main compartment opening. There are additional pockets as well, my favorite being the one on the back designed to accommodate magazines bought at the airport. It’s a really useful and well thought out design feature. The exterior compression straps allow smaller loads to be cinched up keeping the shape of the bag intact. Osprey makes solid bags, and the Ozone is no exception. This is a great travel bag, and it’s light weight should help avoid check in for carry-ons over a certain weight.