For light mountaineering trips and go-light backpacking, the Osprey Aether 60 backpack offers a high performance suspension system typically reserved for larger packs. Two aluminum rods attached to the periphery of the backpanel evenly transfer the weight to the IsoForm custom moldable hipbelt. From there, the weight can be further distributed to the shoulders, where the IsoForm contoured shoulder harness contributes to a comfortable carry. Both the IsoForm hipbelt and shoulder harness are available in four sizes, although most people find that the size included with the pack matches their needs. Osprey pays attention to the details here and everywhere, making sure that all pack surfaces that touch the body do not have seams. This greatly reduces the chances of annoying pressure points developing as the day wears on. The Osprey Aether 60 backpack also offers a number of useful features, especially suited for carrying climbing equipment and camping gear that is usually awkward to carry. Good examples are the durable Stretch Woven front pocket, perfect for carrying a climbing rope, and the sleeping pad straps, removable if the plan is to cut ounces. The Osprey Aether 60 backpack also takes hydration seriously. The external dual entry side pockets accommodate one liter bottles for easy access and an internal backpanel hydration sleeve with exit ports over each shoulder provide hydration customization. The Osprey Aether 60 backpack is designed to comfortably carry loads of 35 to 45 lbs. For larger loads, and the added benefit of a zippered sleeping bag compartment, be sure to check out the Osprey Aether 70 and Aether 85 backpacks.