Classic Plus Backpack 42L

Cabin Zero Classic Plus Backpack 42L is a 42L, 1.2kg2.6lb travel backpack measuring 54×35×20cm21.5×14×8in. It fits the carry-on size limit of 35 of 36 major airlines and the personal-item limit of 0 of 26. Under the seat, its 54cm21.3in side is over the 40cm15.7in limit at 12 of the 26 airlines it misses. Specs from cabinzero.com, checked September 2026.

Volume: 42Lfixed size
Weight: 1.2kg2.6lb2.6lb1.2kg
Carry-on: 35/36airlines fit it
Personal item: 0/26under-seat limits

Dimensions: 54×35×20cm21.5×14×8in 21.5×14×8in54×35×20cm
Price: $141 as of September 2026
Laptop: up to 17"
Opening: Clamshell, Full clamshell opening
Warranty: Lifetime Manufacturing defects only, not normal wear, misuse or cosmetic damage.
Compartments: n/a
Bottle pockets: 1

Price history

$143 at every weekly check since Oct 5, 2026 (3 checks).

Checked weekly on the brand's US store.

Organizer
Frame sheet
Water-resistant
Sternum strap
Shoulder strap
Luggage pass-through

Material: 600 denier polyester body, 200 denier polyester lining

HDPE board frame sheet, chest belt, no hip belt
Trolley handle sleeve for stacking on suitcase handles
Best fit: 2 packing cube sets, ideal for 7+ day trips

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

Does the Cabin Zero Classic Plus Backpack 42L fit airline carry-on limits?

Draw against

Cabin bag, tight (no spare)Cabin bag, tight (no spare) 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	Tight fit (no spare)Tight fit (no spare)	Too bigToo big	5.8kg to pack (of 7kg)12.8lb to pack (of 15.4lb)
Air CanadaCabin bag not on every fare	Tight fit (1cm spare)Tight fit (0.4in spare)	Too bigToo big	No published limitNo published limit
Air FranceCabin bag not on every fare	Tight fit (no spare)Tight fit (no spare)	Too bigToo big	10.8kg to pack (of 12kg shared with personal item)23.8lb to pack (of 26.5lb shared with personal item)
Air India	Tight fit (no spare)Tight fit (no spare)	No published limit	5.8kg to pack (of 7kg)12.8lb to pack (of 15.4lb)
AirAsia	Tight fit (1cm spare)Tight fit (0.4in spare)	Too bigToo big	5.8kg to pack (of 7kg shared with personal item)12.8lb to pack (of 15.4lb shared with personal item)
Alaska Airlines	Tight fit (1cm spare)Tight fit (0.4in spare)	No published limit	No published limitNo published limit
Allegiant AirCabin bag not on every fare	Tight fit (1cm spare)Tight fit (0.4in spare)	Too bigToo big	No published limitNo published limit
American Airlines	Tight fit (1cm spare)Tight fit (0.4in spare)	Too bigToo big	No published limitNo published limit
ANA (All Nippon Airways)	Tight fit (1cm spare)Tight fit (0.4in spare)	Too bigToo big	8.8kg to pack (of 10kg shared with personal item)19.4lb to pack (of 22lb shared with personal item)
AviancaCabin bag not on every fare	Tight fit (no spare)Tight fit (no spare)	No published limit	8.8kg to pack (of 10kg)19.4lb to pack (of 22lb)
British Airways	FitsFits	Too bigToo big	No published limitNo published limit
Cebu Pacific	Tight fit (1cm spare)Tight fit (0.4in spare)	Too bigToo big	8.8kg to pack (of 10kg shared with personal item)19.4lb to pack (of 22lb shared with personal item)
Delta Air Lines	Tight fit (1cm spare)Tight fit (0.4in spare)	No published limit	No published limitNo published limit
easyJetCabin bag not on every fare	FitsFits	Too bigToo big	13.8kg to pack (of 15kg)30.4lb to pack (of 33.1lb)
Emirates	Tight fit (1cm spare)Tight fit (0.4in spare)	No published limit	5.8kg to pack (of 7kg)12.8lb to pack (of 15.4lb)
Frontier AirlinesCabin bag not on every fare	FitsFits	Too bigToo big	14.7kg to pack (of 15.9kg)32.4lb to pack (of 35.1lb)
Gol Linhas Aereas	Tight fit (no spare)Tight fit (no spare)	No published limit	8.8kg to pack (of 10kg)19.4lb to pack (of 22lb)
IndiGo	Tight fit (no spare)Tight fit (no spare)	No published limit	5.8kg to pack (of 7kg)12.8lb to pack (of 15.4lb)
JetBlue Airways	Tight fit (1cm spare)Tight fit (0.4in spare)	Too bigToo big	No published limitNo published limit
KLMCabin bag not on every fare	Tight fit (no spare)Tight fit (no spare)	Too bigToo big	10.8kg to pack (of 12kg shared with personal item)23.8lb to pack (of 26.5lb shared with personal item)
LATAM Airlines	Tight fit (no spare)Tight fit (no spare)	Too bigToo big	10.8kg to pack (of 12kg)23.8lb to pack (of 26.5lb)
LufthansaCabin bag not on every fare	Tight fit (1cm spare)Tight fit (0.4in spare)	Too bigToo big	6.8kg to pack (of 8kg)15lb to pack (of 17.6lb)
Norwegian Air ShuttleCabin bag not on every fare	Tight fit (1cm spare)Tight fit (0.4in spare)	Too bigToo big	8.8kg to pack (of 10kg shared with personal item)19.4lb to pack (of 22lb shared with personal item)
Qantas	Tight fit (1cm spare)Tight fit (0.4in spare)	No published limit	5.8kg to pack (of 7kg shared with personal item)12.8lb to pack (of 15.4lb shared with personal item)
Qatar Airways	Too bigToo big	No published limit	5.8kg to pack (of 7kg)12.8lb to pack (of 15.4lb)
RyanairCabin bag not on every fare	Tight fit (no spare)Tight fit (no spare)	Too bigToo big	8.8kg to pack (of 10kg)19.4lb to pack (of 22lb)
SAS	Tight fit (1cm spare)Tight fit (0.4in spare)	Too bigToo big	6.8kg to pack (of 8kg)15lb to pack (of 17.6lb)
Singapore Airlines	FitsFits	Too bigToo big	5.8kg to pack (of 7kg)12.8lb to pack (of 15.4lb)
Southwest Airlines	FitsFits	No published limit	No published limitNo published limit
Turkish Airlines	Tight fit (1cm spare)Tight fit (0.4in spare)	Too bigToo big	6.8kg to pack (of 8kg)15lb to pack (of 17.6lb)
United AirlinesCabin bag not on every fare	Tight fit (no spare)Tight fit (no spare)	Too bigToo big	No published limitNo published limit
Vietjet Air	Tight fit (1cm spare)Tight fit (0.4in spare)	Too bigToo big	5.8kg to pack (of 7kg shared with personal item)12.8lb to pack (of 15.4lb shared with personal item)
VolarisCabin bag not on every fare	Tight fit (1cm spare)Tight fit (0.4in spare)	Too bigToo big	8.8kg to pack (of 10kg)19.4lb to pack (of 22lb)
VuelingCabin bag not on every fare	Tight fit (no spare)Tight fit (no spare)	Too bigToo big	8.8kg to pack (of 10kg)19.4lb to pack (of 22lb)
WestJetCabin bag not on every fare	Tight fit (1cm spare)Tight fit (0.4in spare)	Too bigToo big	No published limitNo published limit
Wizz AirCabin bag not on every fare	Tight fit (1cm spare)Tight fit (0.4in spare)	Too bigToo big	8.8kg to pack (of 10kg)19.4lb 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 1.2kg2.6lb. Limits and sources. Own a different bag? Check it against every airline.