Osprey Aether AG 70 Backpack Stow-on-the-Go trekking pole attachment External hydration sleeve in backpanel simplifies refilling and protects pack contents from spills New IsoForm CM hipbelt balances firmness and cushioning for optimal carry CUSTOM FIT:The IsoForm5 harness and CM hipbelt provide outstanding fit and comfort for especially heavy loads and long miles. Both components are interchangeable to provide a truly custom fit. LightWire peripheral frame effectively transfers load to hipbelt Front J-zip provides quick access to main compartment