For committing thru-hikes where every gram counts, the 55-liter Eja Pro provides the most comfortable carry in its weight class. Shedding nearly a full pound off from the Eja 58, the Pro features a more fine-tuned adjustment system for its ventilated Air Speed suspension system with anatomical women’s fit. Comfort, without weighing you down….. Removable, floating single compartment top lid with key clip. Four webbing lash points on top lid. Flap Jacket secures main compartment access and provides weather protection when lid isn’t used. Removing top lid reduces carry capacity by 9 L and weight by 80 g. Internal hydration sleeve with center back hose port and Osprey Hydraclip for easier reservoir hanging. Internal compression strap keeps loads stable. Large front fabric compression pocket with stretch side panels accommodates overloads. Multiple front panel lash points for securing extra gear. Lower side compression straps designed to capture sleeping pad on front panel. Deep, dual access stretch mesh side pockets. Dual ice axe loops with handle capture by upper compression straps. MAIN: Nano Fly: 100D Nylon x 200D UHMWPE ripstop, DWR treatments made without PFAS. BOTTOM: Nano Fly: 100D Nylon x 200D UHMWPE ripstop, DWR treatments made without PFAS….. XS/S… VOLUME: 3173 IN3 / 52 L. DIMENSIONS: 26.38H X 14.17W X 12.2D IN. WEIGHT: 1.927 LBS….. M/L… VOLUME: 3356 IN3 / 55 L. DIMENSIONS: 28.35H X 14.17W X 12.2D IN. WEIGHT: 2.059 LBS.