Atmos 50 Superlight Backpacking, Active Adventure The Atmos 50 provides the ideal volume for your next ultralight backpacking experience. At 3000 cubic inches and with an average weight of three pounds, you can carry your ultralight essentials with ease and comfort. A traditional floating top pocket/top load design and twin front pockets with welded water resistant zips makes loading easy. Other features include an internal hydration sleeve, zippered mesh pockets on the hipbelt and removable sleeping pad straps. * Floating top pocket * Large twin front pockets with welded water resistant zips * Welded front stretch woven pocket * Hydration cavity behind mesh panel with hydration tubing port holes * Daisy chain with removable shockcord clips Colors available: Cinder Cone Red, Slate Blue Atmos 50 Features ErgoPull Hipbelt Removable Sleeping Pad Straps Stretch Woven Side Pockets Versatile Load Options Water Resistant Zippers Welded Stretch Woven Front Pocket Zippered Mesh Hipbelt Pockets ErgoPull Hipbelt The ErgoPull hipbelt, Osprey's often-imitated tensioning system, draws the load evenly over the user's hips, effectively avoiding pressure points. Carrying Capacity The green to yellow zones represent the recommended carry range for this pack. Volumes and Weights US and International weight and volume specifications. Size cu. in. liter lbs/oz kg. S 2800 47 2/15 1.33 M 3000 50 3/1 1.38 L 3200 53 3/3 1.45