Osprey Eja Pro 55

Osprey says about the Eja Pro 55

For committing thru-hikes where every gram counts, the 55-litre 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 AirSpeed™ suspension system with anatomical women's fit. Comfort, without weighing you down.