🎒
Ultralight Pack
$239

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
$239
Capacity
40 L
Weight
0.62 lbs
Best For
Sub-10 lb base weight hikers who want a waterproof frameless pack

Specifications

Type
Ultralight Pack
Frame Type
Frameless
Capacity
40 L
Weight
0.62 lbs
Max Recommended Load
Not specified by the manufacturer
Torso Fit
See manufacturer sizing
Material
Ultra 100X with waterproof taped seams
Back Panel
Frameless
Warranty
Manufacturer warranty; terms not published
Raincover Included
No
Fits BV500 Bear Canister
No

Sizes Available

CapacityPriceWeight
30 L$239
40 Lthis pack$2390.62 lbs
50 L$239

Features

Hipbelt Pockets

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.

Related backpacks

More from Zpacks
🎒
$279
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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.

40 L0.69 lbsUltra fabric with waterproof taped seams

Weight

0.69 lbs

Capacity

40 L

Frame

Frameless

Also in 30 L / 50 L

Best for: Frameless hikers wanting more durability than the Nero Classic offers
View details
Zpacks Arc Haul Ultra 60
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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.

60 L1.34 lbsVentilated Arc FrameVentilated back

Weight

1.32 lbs

Capacity

60 L

Frame

Internal Frame

Also in 40 L / 50 L / 70 L

Best for: Gram-counters who refuse to give up back ventilation
View details
🎒
$449
Ultralight Pack

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.

62 L1.49 lbsUltra fabric with waterproof taped seams

Weight

1.49 lbs

Capacity

62 L

Frame

Internal Frame

Best for: Thru-hikers wanting the Arc suspension plus full front access
View details