Osprey Aether 60 Mountaineering Backpack AirScape suspension - peripheral 7075 AL rods, ventilated nubbed foam backpanel and internal framesheet with single aluminum stay. Welded stretch woven front pocket, convertible top pocket and dual entry stretch woven side pockets Sleeping bag compartment and sleeping pad straps IsoForm harness with dual density foam, IsoForm CM hipbelt, and internal backpanel hydration sleeve with dual exit ports.