Axiom S2 WX Pack

Triple Aught Design Axiom S2 WX Pack is a 19L, 1.63kg3.6lb travel backpack measuring 50.2×30.5×12.7cm20×12×5in. 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 50.2cm19.8in side is over the 40cm15.7in limit at 12 of the 26 airlines it misses. Specs from tripleaughtdesign.com, checked October 2026.

Volume: 19Lfixed size
Weight: 1.63kg3.6lb3.6lb1.63kg
Carry-on: 35/36airlines fit it
Personal item: 0/26under-seat limits

Dimensions: 50.2×30.5×12.7cm20×12×5in 20×12×5in50.2×30.5×12.7cm
Price: $485 as of October 2026
Laptop: up to 16"
Opening: top-down main compartment, side-panel access to main and laptop compartments
Warranty: No fixed term Defects in material, design or construction judged against the item's expected life; repair first, then replace.
Compartments: n/a
Bottle pockets: 1

Organizer

Material: TexWax shell (85% cotton, 15% Cordura nylon, 12 oz canvas duck), 500D Cordura lining, Hypalon

Fully padded laptop compartment fits a 16 in laptop
Side pocket with 6 in of expansion fits a 1 liter bottle
Cut and sewn in the USA

Last checked: 2026-10. Prices and specs may have changed.

Does the Triple Aught Design Axiom S2 WX Pack fit airline carry-on limits?

Draw against

Fits as a cabin bagFits as a cabin bag 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	FitsFits	Too bigToo big	5.4kg to pack (of 7kg)11.9lb to pack (of 15.4lb)
Air CanadaCabin bag not on every fare	FitsFits	Too bigToo big	No published limitNo published limit
Air FranceCabin bag not on every fare	FitsFits	Too bigToo big	10.4kg to pack (of 12kg shared with personal item)22.9lb to pack (of 26.5lb shared with personal item)
Air India	FitsFits	No published limit	5.4kg to pack (of 7kg)11.9lb to pack (of 15.4lb)
AirAsia	FitsFits	Too bigToo big	5.4kg to pack (of 7kg shared with personal item)11.9lb to pack (of 15.4lb shared with personal item)
Alaska Airlines	FitsFits	No published limit	No published limitNo published limit
Allegiant AirCabin bag not on every fare	FitsFits	Too bigToo big	No published limitNo published limit
American Airlines	FitsFits	Too bigToo big	No published limitNo published limit
ANA (All Nippon Airways)	FitsFits	Too bigToo big	8.4kg to pack (of 10kg shared with personal item)18.5lb to pack (of 22lb shared with personal item)
AviancaCabin bag not on every fare	FitsFits	No published limit	8.4kg to pack (of 10kg)18.5lb to pack (of 22lb)
British Airways	FitsFits	Too bigToo big	No published limitNo published limit
Cebu Pacific	FitsFits	Too bigToo big	8.4kg to pack (of 10kg shared with personal item)18.5lb to pack (of 22lb shared with personal item)
Delta Air Lines	FitsFits	No published limit	No published limitNo published limit
easyJetCabin bag not on every fare	FitsFits	Too bigToo big	13.4kg to pack (of 15kg)29.5lb to pack (of 33.1lb)
Emirates	FitsFits	No published limit	5.4kg to pack (of 7kg)11.9lb to pack (of 15.4lb)
Frontier AirlinesCabin bag not on every fare	FitsFits	Too bigToo big	14.3kg to pack (of 15.9kg)31.5lb to pack (of 35.1lb)
Gol Linhas Aereas	FitsFits	No published limit	8.4kg to pack (of 10kg)18.5lb to pack (of 22lb)
IndiGo	FitsFits	No published limit	5.4kg to pack (of 7kg)11.9lb to pack (of 15.4lb)
JetBlue Airways	FitsFits	Too bigToo big	No published limitNo published limit
KLMCabin bag not on every fare	FitsFits	Too bigToo big	10.4kg to pack (of 12kg shared with personal item)22.9lb to pack (of 26.5lb shared with personal item)
LATAM Airlines	FitsFits	Too bigToo big	10.4kg to pack (of 12kg)22.9lb to pack (of 26.5lb)
LufthansaCabin bag not on every fare	FitsFits	Too bigToo big	6.4kg to pack (of 8kg)14.1lb to pack (of 17.6lb)
Norwegian Air ShuttleCabin bag not on every fare	FitsFits	Too bigToo big	8.4kg to pack (of 10kg shared with personal item)18.5lb to pack (of 22lb shared with personal item)
Qantas	FitsFits	No published limit	5.4kg to pack (of 7kg shared with personal item)11.9lb to pack (of 15.4lb shared with personal item)
Qatar Airways	Too bigToo big	No published limit	5.4kg to pack (of 7kg)11.9lb to pack (of 15.4lb)
RyanairCabin bag not on every fare	FitsFits	Too bigToo big	8.4kg to pack (of 10kg)18.5lb to pack (of 22lb)
SAS	FitsFits	Too bigToo big	6.4kg to pack (of 8kg)14.1lb to pack (of 17.6lb)
Singapore Airlines	FitsFits	Too bigToo big	5.4kg to pack (of 7kg)11.9lb to pack (of 15.4lb)
Southwest Airlines	FitsFits	No published limit	No published limitNo published limit
Turkish Airlines	FitsFits	Too bigToo big	6.4kg to pack (of 8kg)14.1lb to pack (of 17.6lb)
United AirlinesCabin bag not on every fare	FitsFits	Too bigToo big	No published limitNo published limit
Vietjet Air	FitsFits	Too bigToo big	5.4kg to pack (of 7kg shared with personal item)11.9lb to pack (of 15.4lb shared with personal item)
VolarisCabin bag not on every fare	FitsFits	Too bigToo big	8.4kg to pack (of 10kg)18.5lb to pack (of 22lb)
VuelingCabin bag not on every fare	FitsFits	Too bigToo big	8.4kg to pack (of 10kg)18.5lb to pack (of 22lb)
WestJetCabin bag not on every fare	FitsFits	Too bigToo big	No published limitNo published limit
Wizz AirCabin bag not on every fare	FitsFits	Too bigToo big	8.4kg to pack (of 10kg)18.5lb 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 1.63kg3.6lb. Limits and sources. Own a different bag? Check it against every airline.