Osprey Exos Pro 55 vs Osprey Eja Pro 55
Quick take: The Osprey Eja Pro 55 costs $5 less; the Osprey Exos Pro 55 is lighter (2.08 vs 2.1 lbs).
Which one to buy
Hipbelt pockets are the one real feature gap between these twins. The Exos Pro 55 has half-liter hipbelt pockets that are usable rather than token; the Eja Pro 55, its women's counterpart, has none. Otherwise they share the NanoFly nylon and UHMWPE ripstop, the AirSpeed mesh on a light frame, a removable lid, a 30 lb ceiling and a weight within a few hundredths of a pound. The Eja Pro is $5 cheaper.
Sizing is the other decider. The Eja Pro fits XS/S 13-17 in and M/L 16-20 in torsos, so a short torso has a real option, and its XS/S drops to 52 L and 1.9 lbs. The Exos Pro comes in S/M and L/XL, so a hiker near either end of the range should check Osprey's chart or try it on before ordering.
Some cautions apply to the shared design: the Exos Pro's frame is noticeably at its limit at 30 lbs, its measured main-compartment volume is about 46 L, and one reviewer's pack soaked through after an afternoon of rain, so run a liner. If the Eja Pro's harness fits you, it is the same pack for slightly less, minus the pockets on the belt.
Osprey Exos Pro 55
Best if your torso runs long or a unisex harness suits you, and you want hipbelt pockets built in.
Osprey Eja Pro 55
For women, especially short-torsoed ones, who fit its XS/S or M/L sizes and don't mind carrying snacks somewhere other than the hipbelt.
| Spec | Osprey Exos Pro 55 | Osprey Eja Pro 55 |
|---|---|---|
| Price | $330 | $325 |
| Rating | 4.1★ (37) | — |
| Type | Ultralight Pack | Ultralight Pack |
| Frame Type | Internal Frame | Internal Frame |
| Capacity | 55 L | 55 L |
| Weight | 2.08 lbs | 2.1 lbs |
| Max Load | 30 lbs | 10-30 lbs |
| Torso Fit | S/M and L/XL | XS/S 13-17 in, M/L 16-20 in |
| Material | NanoFly 100D nylon x 200D UHMWPE ripstop | NanoFly 100D nylon x 200D UHMWPE ripstop, PFAS-free DWR |
| Back Panel | AirSpeed suspended mesh over 3.5 mm LightWire frame | AirSpeed 3D-tensioned breathable mesh |
| Adjustable torso | Yes | No |
| Ventilated back | Yes | Yes |
| Raincover included | No | No |
| Hipbelt pockets | Yes | No |
| Removable lid | Yes | Yes |
| Hydration sleeve | Yes | Yes |
| Fits BV500 bear can | No | No |
| Warranty | Osprey All Mighty Guarantee (lifetime) | Osprey All Mighty Guarantee (lifetime) |
Pros & cons
Osprey Exos Pro 55
- ✓33.2 oz for a framed 55 L pack with suspended mesh is competitive with cottage ultralight packs that offer neither.
- ✓The lid removes to save 2.8 oz, so the pack can be stripped for shorter trips.
- ✓NanoFly's UHMWPE grid gives far better tear resistance than the denier alone suggests.
- ✓A 0.60 oz per litre ratio is excellent for a pack with a real frame and ventilation.
- ✓Side pockets swallow five 700 ml bottles, which is unusually generous.
- ✓Half-litre hipbelt pockets are usable rather than token.
- ✓About three-quarters of a pound lighter than the standard Exos 58 for only 3 L less volume.
- ✓Osprey's All Mighty Guarantee, which almost no cottage ultralight brand matches.
- ✗30 lb is the manufacturer ceiling and the frame is noticeably at its limit there.
- ✗The frame and hipbelt are both non-removable, so the pack cannot be stripped further.
- ✗$330 is more than the standard Exos 58 and than several cottage packs.
- ✗Measured main compartment is 46 L against 55 L advertised.
- ✗Only one volume is offered, unlike the three-size Exos and Eja runs.
- ✗NanoFly is light enough that careless handling on rock will still damage it.
- ✗No rain cover included.
Osprey Eja Pro 55
- ✓2.1 lbs with a framed, ventilated mesh back
- ✓NanoFly UHMWPE ripstop combines nylon with UHMWPE for abrasion resistance at low weight
- ✓Removable lid for a lighter, simpler setup
- ✓XS/S fits torsos from 13 in
- ✓Large front compression pocket expands for overloads
- ✗$325 list price, $40 more than the Eja 58
- ✗10-30 lb rating limits food and water carries
- ✗No hipbelt pockets listed
- ✗No raincover included
- ✗Torso is set by size, not adjustable
Osprey Exos Pro 55 vs Osprey Eja Pro 55: common questions
Does the Eja Pro 55 carry less than the Exos Pro 55?▾
Both top out at 30 lbs. The Exos Pro's frame is noticeably at its limit there, and the Eja Pro shares the same light frame idea, so keep loads comfortably under that ceiling in either.
Which one works for a torso under 16 inches?▾
The Eja Pro 55, whose XS/S size fits 13-17 in torsos. The Exos Pro 55 comes in S/M and L/XL, so check Osprey's chart before assuming it goes that short.
Is the missing hipbelt pocket on the Eja Pro 55 a big deal?▾
Only if you snack on the move. The Exos Pro's half-liter hipbelt pockets keep a phone and food in reach, while the Eja Pro relies on its large front compression pocket, which means stopping or reaching back.