The Atmos 65 Backpack has been a popular choice among serious backpackers for a few seasons now, and Osprey just upgraded it with a new back-panel design. Now the Atmos sits even closer to your back for better support when you really load this pack to the gills. Of course, Osprey kept the vented back panel and mesh straps to let cool air flow during hot summer backpacking trips. You also get a healthy helping of pockets to keep everything organized.