Zpacks
Zpacks Nero Classic 40
The Nero is Zpacks' frameless pack and at 9.9 oz the lightest framed-or-otherwise hiking pack in this catalog. Ultra 100X with taped seams makes it genuinely waterproof at a weight where most packs are barely water-resistant.
Price and availability on Zpacks’s site may differ.
Specifications
What do these specs mean? →Sizes Available
| Capacity | Price | Weight |
|---|---|---|
| 30 L | $239 | — |
| 40 Lthis pack | $239 | 0.62 lbs |
| 50 L | $239 | — |
Features
Pros
- ✓9.9 oz is the lightest hiking pack in this entire catalog, lighter even than the Cotopaxi Batac.
- ✓Ultra 100X with taped seams is genuinely waterproof, not merely treated.
- ✓Three volumes from 30 to 50 L on the same frameless design.
- ✓$239 is reasonable for a laminate pack from an established maker.
- ✓Zpacks has one of the longest DCF and Ultra track records in the segment.
- ✓Nothing rigid to break, bend or rattle.
- ✓40 L is workable for a genuinely light multi-day kit.
- ✓Hipbelt pockets included despite the minimal design.
Cons
- ✗Frameless at 40 L demands a very low base weight to carry tolerably.
- ✗No published maximum load figure.
- ✗Ultra 100X is the thinnest of the Ultra family and abrades at fold lines.
- ✗No adjustable torso.
- ✗Difficult and expensive to repair in the field.
- ✗Sub-10 oz construction leaves no margin for rough handling.
- ✗Bear canisters do not fit sensibly in a frameless 40 L pack.
- ✗Warranty terms are not published in the way major brands publish them.
Common Questions
Compare the Zpacks Nero Classic 40
Related backpacks
More from Zpacks →Zpacks
Zpacks Nero Pro 40
The Nero Pro is the upgraded Nero: 11.1 oz against the Classic's 9.9, for a $40 premium. The extra weight buys a more robust build in the same frameless, waterproof format across the same 30 to 50 L range.
Weight
0.69 lbs
Capacity
40 L
Frame
Frameless
Also in 30 L / 50 L

Zpacks
Zpacks Arc Haul Ultra 60
The Arc Haul Ultra 60 is Zpacks' engineering statement: a 21.7-ounce pack whose carbon arc frame tensions a mesh panel off your back — the only true ventilation in the sub-1.5-lb class. Backpacker magazine named it the best ultralight pack of 2026.
Weight
1.32 lbs
Capacity
60 L
Frame
Internal Frame
Also in 40 L / 50 L / 70 L

Zpacks
Zpacks Arc Zip Ultra 62
The Arc Zip is the Arc Haul with front zip access, so the pack opens like a suitcase instead of only from the top. It keeps the tensioned carbon arc that lifts the pack off the back -- Zpacks' distinguishing feature -- at 23.9 oz for 62 L.
Weight
1.49 lbs
Capacity
62 L
Frame
Internal Frame
Pa'lante Packs
Pa'lante Packs V2
The Pa'lante V2 is the lightest pack in this catalog at 18.6 oz, and the clearest expression of the frameless ultralight philosophy: no frame, no stays, no lid, and a bottom pocket instead of a brain. It only works for hikers whose base weight is low enough that a frame is genuinely unnecessary.
Weight
1.16 lbs
Capacity
37 L
Frame
Frameless
LiteAF
LiteAF ECOPAK 30L Curve
LiteAF builds to order in ECOPAK, a recycled laminate that is waterproof like Ultra but made from post-consumer polyester. At 13 oz for 45 L of total volume it is one of the lightest packs in this catalog, and custom sizing is included in the price.
Weight
0.81 lbs
Capacity
45 L
Frame
Frameless
Mountain Laurel Designs
Mountain Laurel Designs Exodus 55
The Exodus is Mountain Laurel Designs' 55 L frameless pack, offered in a choice of UltraGrid or Ultra X fabrics which is why the price runs from $245 to $325. At 1 lb 2 oz for 58 L of measured volume it has one of the best weight-to-volume ratios here.
Weight
1.13 lbs
Capacity
58 L
Frame
Frameless