Osprey Eja Pro 55

The Eja Pro 55 is the lightest pack in the entire Eja line — at 52 liters (55 with the extension collar), it weighs just 870 g, under 16 g per liter. That ratio is exceptional for a pack with a rigid aluminum frame, putting the Eja Pro alongside genuinely minimalist designs, yet it still carries an 18 kg max load rating — higher than the much heavier Aura AG 65. The low weight comes from Nanofly fabric, a 100D nylon and 200D UHMWPE ripstop blend that offers high tear resistance without added grams. Torso length adjusts across a wide 33–51 cm range, and the removable lid with its pocket comes off when you don't need it. Two side pockets, two ice axe loops, reflective elements, and a free lifetime repair program round out the spec sheet. There's no integrated rain cover or hydration reservoir included — a typical trade-off for hikers chasing the lowest possible base weight on multi-day treks and thru-hikes.