Nero Pro 40L

Zpacks Nero Pro 40L is a 40L, 0.35kg0.8lb travel backpack measuring 63.5×29×15.25cm25×11.5×6in. It fits the carry-on size limit of 1 of 36 major airlines and the personal-item limit of 0 of 26. Under the seat, its 63.5cm25in side is over the 40cm15.7in limit at 12 of the 26 airlines it misses. Specs from zpacks.com, checked September 2026.

Volume: 40Lfixed size
Weight: 0.35kg0.8lb0.8lb0.35kg
Carry-on: 1/36airlines fit it
Personal item: 0/26under-seat limits

Dimensions: 63.5×29×15.25cm25×11.5×6in 25×11.5×6in63.5×29×15.25cm
Price: $299 as of September 2026
Laptop: no laptop sleeve
Opening: Roll-top, Roll top closure
Warranty: 2 years Limited warranty against manufacturing, material and design defects; repaired or replaced case by case.
Torso length: 46 to 56cm (18 to 22in)
Compartments: 1
Bottle pockets: 2

Price history

$279 at every weekly check since Oct 5, 2026 (3 checks).

Checked weekly on the brand's US store.

Hydration sleeve
Water-resistant
Hip belt (insert sold separately)
Sternum strap

Material: Ultra 100X (3.3 oz/sqyd) back and bottom, Ultra TenX (2.9 oz/sqyd) front, Venom Stretch Mesh pockets, taped seams, PFAS free

Stretch mesh center, side and bottom pockets; zippered 3D mesh back sleeve holds the included foam sit pad
Zpacks says it fits in overhead bins, or under seats with the top rolled down small
Weight with standard straps and no belt; webbing or padded hip belts are paid options
Height is the body height with the roll top open

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Last checked: 2026-09. Prices and specs may have changed.

Does the Zpacks Nero Pro 40L fit airline carry-on limits?

Draw against

Too bigToo big on Ryanair. cabin bag 55×40×20cm21.5×15.5×8in · under the seat 40×30×20cm15.5×12×8in. Bag in cminches, turned to fit.

Flag as a tight fit undercm spare

Airline	Carry-on	Personal item	Cabin-bag weight
Air Arabia	Too bigToo big	Too bigToo big	6.7kg to pack (of 7kg)14.8lb to pack (of 15.4lb)
Air CanadaCabin bag not on every fare	Too bigToo big	Too bigToo big	No published limitNo published limit
Air FranceCabin bag not on every fare	Too bigToo big	Too bigToo big	11.7kg to pack (of 12kg shared with personal item)25.8lb to pack (of 26.5lb shared with personal item)
Air India	Too bigToo big	No published limit	6.7kg to pack (of 7kg)14.8lb to pack (of 15.4lb)
AirAsia	Too bigToo big	Too bigToo big	6.7kg to pack (of 7kg shared with personal item)14.8lb to pack (of 15.4lb shared with personal item)
Alaska Airlines	Too bigToo big	No published limit	No published limitNo published limit
Allegiant AirCabin bag not on every fare	Too bigToo big	Too bigToo big	No published limitNo published limit
American Airlines	Too bigToo big	Too bigToo big	No published limitNo published limit
ANA (All Nippon Airways)	Too bigToo big	Too bigToo big	9.7kg to pack (of 10kg shared with personal item)21.4lb to pack (of 22lb shared with personal item)
AviancaCabin bag not on every fare	Too bigToo big	No published limit	9.7kg to pack (of 10kg)21.4lb to pack (of 22lb)
British Airways	Too bigToo big	Too bigToo big	No published limitNo published limit
Cebu Pacific	Too bigToo big	Too bigToo big	9.7kg to pack (of 10kg shared with personal item)21.4lb to pack (of 22lb shared with personal item)
Delta Air Lines	Too bigToo big	No published limit	No published limitNo published limit
easyJetCabin bag not on every fare	Too bigToo big	Too bigToo big	14.7kg to pack (of 15kg)32.4lb to pack (of 33.1lb)
Emirates	Too bigToo big	No published limit	6.7kg to pack (of 7kg)14.8lb to pack (of 15.4lb)
Frontier AirlinesCabin bag not on every fare	Too bigToo big	Too bigToo big	15.6kg to pack (of 15.9kg)34.4lb to pack (of 35.1lb)
Gol Linhas Aereas	Too bigToo big	No published limit	9.7kg to pack (of 10kg)21.4lb to pack (of 22lb)
IndiGo	Too bigToo big	No published limit	6.7kg to pack (of 7kg)14.8lb to pack (of 15.4lb)
JetBlue Airways	Too bigToo big	Too bigToo big	No published limitNo published limit
KLMCabin bag not on every fare	Too bigToo big	Too bigToo big	11.7kg to pack (of 12kg shared with personal item)25.8lb to pack (of 26.5lb shared with personal item)
LATAM Airlines	Too bigToo big	Too bigToo big	11.7kg to pack (of 12kg)25.8lb to pack (of 26.5lb)
LufthansaCabin bag not on every fare	Too bigToo big	Too bigToo big	7.7kg to pack (of 8kg)17lb to pack (of 17.6lb)
Norwegian Air ShuttleCabin bag not on every fare	Too bigToo big	Too bigToo big	9.7kg to pack (of 10kg shared with personal item)21.4lb to pack (of 22lb shared with personal item)
Qantas	Too bigToo big	No published limit	6.7kg to pack (of 7kg shared with personal item)14.8lb to pack (of 15.4lb shared with personal item)
Qatar Airways	Too bigToo big	No published limit	6.7kg to pack (of 7kg)14.8lb to pack (of 15.4lb)
RyanairCabin bag not on every fare	Too bigToo big	Too bigToo big	9.7kg to pack (of 10kg)21.4lb to pack (of 22lb)
SAS	Too bigToo big	Too bigToo big	7.7kg to pack (of 8kg)17lb to pack (of 17.6lb)
Singapore Airlines	FitsFits	Too bigToo big	6.7kg to pack (of 7kg)14.8lb to pack (of 15.4lb)
Southwest Airlines	Too bigToo big	No published limit	No published limitNo published limit
Turkish Airlines	Too bigToo big	Too bigToo big	7.7kg to pack (of 8kg)17lb to pack (of 17.6lb)
United AirlinesCabin bag not on every fare	Too bigToo big	Too bigToo big	No published limitNo published limit
Vietjet Air	Too bigToo big	Too bigToo big	6.7kg to pack (of 7kg shared with personal item)14.8lb to pack (of 15.4lb shared with personal item)
VolarisCabin bag not on every fare	Too bigToo big	Too bigToo big	9.7kg to pack (of 10kg)21.4lb to pack (of 22lb)
VuelingCabin bag not on every fare	Too bigToo big	Too bigToo big	9.7kg to pack (of 10kg)21.4lb to pack (of 22lb)
WestJetCabin bag not on every fare	Too bigToo big	Too bigToo big	No published limitNo published limit
Wizz AirCabin bag not on every fare	Too bigToo big	Too bigToo big	9.7kg to pack (of 10kg)21.4lb to pack (of 22lb)

Compared in any orientation against each airline's published size limit. A tight fit has under 2cm to spare, so a packed soft bag may not pass a sizer. Set it to 0 to turn the warning off. Weight is what the airline allows in the cabin minus this bag's empty 0.35kg0.8lb. Limits and sources. Own a different bag? Check it against every airline.