Zpacks Arc Haul Ultra 60 vs Zpacks Nero Pro 40
Quick take: The Zpacks Nero Pro 40 costs $120 less; the Zpacks Arc Haul Ultra 60 carries more (60 vs 40 liters); the Zpacks Nero Pro 40 is lighter (0.69 vs 1.32 lbs).
| Spec | Zpacks Arc Haul Ultra 60 | Zpacks Nero Pro 40 |
|---|---|---|
| Price | $399 | $279 |
| Rating | — | — |
| Type | Ultralight Pack | Ultralight Pack |
| Frame Type | Internal Frame | Frameless |
| Capacity | 60 L | 40 L |
| Weight | 1.32 lbs | 0.69 lbs |
| Max Load | 40 lbs | Not specified by the manufacturer |
| Torso Fit | User-adjustable frame height | See manufacturer sizing |
| Material | Ultra 100X body with nylon mesh pockets | Ultra fabric with waterproof taped seams |
| Back Panel | Curved carbon fibre stays with tensioned arc | Frameless |
| Adjustable torso | Yes | No |
| Ventilated back | Yes | No |
| Raincover included | No | No |
| Hipbelt pockets | Yes | Yes |
| Removable lid | No | No |
| Hydration sleeve | No | No |
| Fits BV500 bear can | Yes | No |
| Warranty | Zpacks 2-year on materials and workmanship | Manufacturer warranty; terms not published |
Pros & cons
Zpacks Arc Haul Ultra 60
- ✓The lightest framed, ventilated 60L pack money can buy — nothing else combines 21.7 oz with a real airflow gap.
- ✓Backpacker magazine's best ultralight pack of 2026, adding mainstream validation to years of thru-hiker use.
- ✓The tensioned arc genuinely works: sweat reports drop dramatically versus foam-back cottage rivals.
- ✓Ultra 100X fabric is waterproof and far more abrasion-resistant than the old DCF packs.
- ✓The user-adjustable frame height effectively customizes torso length — rare in the cottage world.
- ✓Carries 35-40 lbs shockingly well for its weight, per repeated long-trail reviews.
- ✓Modular add-on ecosystem (belt pouches, shoulder pockets, lumbar pads) lets owners spec it like a custom pack.
- ✓Zpacks' repair department keeps long-trail packs alive mid-hike with fast turnarounds.
- ✗Early Ultra-fabric generations had documented delamination reports; Zpacks revised the laminate, but the history follows the brand on Reddit.
- ✗$399 plus the add-ons most people want pushes real cost toward $475.
- ✗The arc frame takes fiddling to tension right, and a mis-set arc pokes the lumbar.
- ✗The 2-year warranty is thin next to ULA's and Osprey's lifetime coverage.
- ✗The curved frame reduces usable volume and makes tall canisters ride oddly.
- ✗No hydration sleeve — bottle-only hydration is assumed.
- ✗Mesh and edge trim wear faster than the body fabric; brush country is not its habitat.
- ✗The whole design rewards careful owners and punishes casual abuse — it's precision gear, not a rental mule.
Zpacks Nero Pro 40
- ✓11.1 oz is still extraordinarily light for a waterproof 40 L pack.
- ✓More robust construction than the Nero Classic for only 1.2 oz more.
- ✓Waterproof taped seams throughout.
- ✓Same three-volume range as the Classic, from 30 to 50 L.
- ✓Zpacks' Ultra fabric expertise is among the deepest in the segment.
- ✓Frameless simplicity with nothing rigid to fail.
- ✓A sensible middle step between the Nero Classic and the framed Arc Haul.
- ✓Hipbelt pockets included.
- ✗$279 is $40 over the Classic for a modest durability gain.
- ✗Still frameless, so the load rides on the shoulders above roughly 20 lb.
- ✗No published maximum load figure.
- ✗No adjustable torso.
- ✗Laminate fabrics are hard to field-repair.
- ✗The Classic-versus-Pro distinction is not well explained in Zpacks' own materials.
- ✗Bear canisters do not fit sensibly at this volume and construction.
- ✗Warranty terms are not published in detail.