Zpacks Arc Haul Ultra 60 vs Hyperlite Mountain Gear Windrider 55
Quick take: The Zpacks Arc Haul Ultra 60 carries more (60 vs 55 liters); the Zpacks Arc Haul Ultra 60 is lighter (1.32 vs 1.83 lbs).
| Spec | Zpacks Arc Haul Ultra 60 | Hyperlite Mountain Gear Windrider 55 |
|---|---|---|
| Price | $399 | $399 |
| Rating | — | — |
| Type | Ultralight Pack | Ultralight Pack |
| Frame Type | Internal Frame | Internal Frame |
| Capacity | 60 L | 55 L |
| Weight | 1.32 lbs | 1.83 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 | Dyneema Woven Composite with mesh front pocket |
| Back Panel | Curved carbon fibre stays with tensioned arc | Removable aluminium stays with foam pad |
| 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.
Hyperlite Mountain Gear Windrider 55
- ✓The mesh front pocket drains and dries, which solid-fabric packs cannot do.
- ✓29.2 oz for a framed waterproof 55 L pack is excellent.
- ✓The 2025 Dyneema Woven Composite update is up to ten times more abrasion resistant than the previous fabric.
- ✓Widened shoulder straps in the 2025 revision address a long-standing complaint.
- ✓Three volumes from 40 to 70 L on the same design.
- ✓Removable aluminium stays allow stripping the pack down further.
- ✓Hyperlite's build quality and seam taping set the benchmark in this segment.
- ✓Strong resale value offsets the high entry price.
- ✗$399 is expensive, and all three volumes cost the same regardless of size.
- ✗The mesh front pocket is the first thing to fail on this style of pack.
- ✗No published maximum load figure.
- ✗No adjustable torso.
- ✗Dyneema creases and wears at fold lines over time.
- ✗Field repair is difficult and expensive compared with woven nylon.
- ✗Hyperlite's own site lists only 'From $395', so per-size pricing had to come from retailers.
- ✗Warranty terms are less generous than the mainstream brands'.