ATD2

ATD Supply ATD2 is a 18L, 1.3kg2.9lb travel backpack measuring 45×25×19cm17.5×10×7.5in.It fits the carry-on size limit of 36 of 36 major airlines and the personal-item limit of 7 of 26. Under the seat, its 45cm17.7in side is over the 40cm15.7in limit at 12 of the 19 airlines it misses. Specs from attitudesupply.com, checked October 2026.

Volume: 18Lexpands to 31L
Weight: 1.3kg2.9lb2.9lb1.3kg
Carry-on: 36/36airlines fit it
Personal item: 7/26under-seat limits

Dimensions: 45×25×19cm17.5×10×7.5in 17.5×10×7.5in45×25×19cm
Price: $456 as of October 2026
Laptop: up to 15"
Opening: Roll-top, expandable roll top with Fidlock magnetic buckle, U-shaped back panel zip for top, side and clamshell access
Warranty: Lifetime Manufacture and material defects, not misuse or normal wear.
Compartments: n/a
Bottle pockets: n/a

Organizer
Frame sheet (removable)
Water-resistant
MOLLE
Hip belt (removable)
Sternum strap (removable)
Luggage pass-through

Material: Challenge Sailcloth Ecopak EPLX600 waterproof laminate (100% post-consumer recycled polyester), RBC 200 lining, YKK zippers

Roll top expands roughly 18 to 31 L; height listed as 45 to 65 cm
Removable Curv frame sheet, sternum strap, hip belt and compression straps
PALS webbing on the bottom; designed and made in Italy

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

Does the ATD Supply ATD2 fit airline carry-on limits?

Draw against

Cabin bag, tight (1cm spare)Cabin bag, tight (0.4in 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 (1cm spare)Tight fit (0.4in spare)	Too bigToo big	5.7kg to pack (of 7kg)12.6lb 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	10.7kg to pack (of 12kg shared with personal item)23.6lb to pack (of 26.5lb shared with personal item)
Air India	Tight fit (1cm spare)Tight fit (0.4in spare)	No published limit	5.7kg to pack (of 7kg)12.6lb to pack (of 15.4lb)
AirAsia	FitsFits	Too bigToo big	5.7kg to pack (of 7kg shared with personal item)12.6lb 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	Tight fit (no spare)Tight fit (no spare)	No published limitNo published limit
American Airlines	FitsFits	Tight fit (no spare)Tight fit (no spare)	No published limitNo published limit
ANA (All Nippon Airways)	FitsFits	Too bigToo big	8.7kg to pack (of 10kg shared with personal item)19.2lb to pack (of 22lb shared with personal item)
AviancaCabin bag not on every fare	FitsFits	No published limit	8.7kg to pack (of 10kg)19.2lb to pack (of 22lb)
British Airways	FitsFits	Tight fit (no spare)Tight fit (no spare)	No published limitNo published limit
Cebu Pacific	FitsFits	Too bigToo big	8.7kg to pack (of 10kg shared with personal item)19.2lb 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	Tight fit (no spare)Tight fit (no spare)	13.7kg to pack (of 15kg)30.2lb to pack (of 33.1lb)
Emirates	FitsFits	No published limit	5.7kg to pack (of 7kg)12.6lb to pack (of 15.4lb)
Frontier AirlinesCabin bag not on every fare	FitsFits	Tight fit (1cm spare)Tight fit (0.4in spare)	14.6kg to pack (of 15.9kg)32.2lb to pack (of 35.1lb)
Gol Linhas Aereas	FitsFits	No published limit	8.7kg to pack (of 10kg)19.2lb to pack (of 22lb)
IndiGo	FitsFits	No published limit	5.7kg to pack (of 7kg)12.6lb 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	10.7kg to pack (of 12kg shared with personal item)23.6lb to pack (of 26.5lb shared with personal item)
LATAM Airlines	FitsFits	Tight fit (no spare)Tight fit (no spare)	10.7kg to pack (of 12kg)23.6lb to pack (of 26.5lb)
LufthansaCabin bag not on every fare	FitsFits	Too bigToo big	6.7kg to pack (of 8kg)14.8lb to pack (of 17.6lb)
Norwegian Air ShuttleCabin bag not on every fare	FitsFits	Too bigToo big	8.7kg to pack (of 10kg shared with personal item)19.2lb to pack (of 22lb shared with personal item)
Qantas	FitsFits	No published limit	5.7kg to pack (of 7kg shared with personal item)12.6lb to pack (of 15.4lb shared with personal item)
Qatar Airways	FitsFits	No published limit	5.7kg to pack (of 7kg)12.6lb to pack (of 15.4lb)
RyanairCabin bag not on every fare	Tight fit (1cm spare)Tight fit (0.4in spare)	Too bigToo big	8.7kg to pack (of 10kg)19.2lb to pack (of 22lb)
SAS	FitsFits	Too bigToo big	6.7kg to pack (of 8kg)14.8lb to pack (of 17.6lb)
Singapore Airlines	FitsFits	Too bigToo big	5.7kg to pack (of 7kg)12.6lb to pack (of 15.4lb)
Southwest Airlines	FitsFits	No published limit	No published limitNo published limit
Turkish Airlines	FitsFits	Too bigToo big	6.7kg to pack (of 8kg)14.8lb 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	5.7kg to pack (of 7kg shared with personal item)12.6lb to pack (of 15.4lb shared with personal item)
VolarisCabin bag not on every fare	FitsFits	Tight fit (no spare)Tight fit (no spare)	8.7kg to pack (of 10kg)19.2lb to pack (of 22lb)
VuelingCabin bag not on every fare	Tight fit (1cm spare)Tight fit (0.4in spare)	Too bigToo big	8.7kg to pack (of 10kg)19.2lb 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	8.7kg to pack (of 10kg)19.2lb 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 1.3kg2.9lb. Limits and sources. Own a different bag? Check it against every airline.