ATD1

ATD Supply ATD1 is a 20L, 1.7kg3.7lb travel backpack measuring 50×30×26cm19.5×12×10in. 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 26cm10.2in side is over the 20cm7.9in limit at 15 of the 26 airlines it misses. Specs from atdsupply.com, checked September 2026.

Volume: 20Lexpands to 55L
Weight: 1.7kg3.7lb3.7lb1.7kg
Carry-on: 1/36airlines fit it
Personal item: 0/26under-seat limits

Dimensions: 50×30×26cm19.5×12×10in 19.5×12×10in50×30×26cm
Price: $510 as of September 2026
Laptop: up to 16"
Opening: Roll-top
Warranty: Lifetime Manufacture and material defects, not misuse or normal wear.
Compartments: 2
Bottle pockets: 2

Price history

Now $503. Lowest seen: $501 on Oct 12, 2026. Highest: $503.

Checked weekly on the brand's US store.

Frame sheet (removable)
Water-resistant
MOLLE
Hip belt (removable)
Sternum strap (removable)

Material: Challenge Sailcloth Ecopak EPLX600 (100% recycled polyester), RBC 200 lining, YKK zippers

Roll-top expands 20-55L; height listed as 50-70cm depending on roll
Removable Propex Curv (self-reinforced polypropylene) frame sheet and hip belt
Designed and manufactured in Italy
Bottom-mounted PALS/MOLLE webbing

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

Does the ATD Supply ATD1 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	5.3kg to pack (of 7kg)11.7lb 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	10.3kg to pack (of 12kg shared with personal item)22.7lb to pack (of 26.5lb shared with personal item)
Air India	Too bigToo big	No published limit	5.3kg to pack (of 7kg)11.7lb to pack (of 15.4lb)
AirAsia	Too bigToo big	Too bigToo big	5.3kg to pack (of 7kg shared with personal item)11.7lb 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	8.3kg to pack (of 10kg shared with personal item)18.3lb to pack (of 22lb shared with personal item)
AviancaCabin bag not on every fare	Too bigToo big	No published limit	8.3kg to pack (of 10kg)18.3lb 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	8.3kg to pack (of 10kg shared with personal item)18.3lb 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	13.3kg to pack (of 15kg)29.3lb to pack (of 33.1lb)
Emirates	Too bigToo big	No published limit	5.3kg to pack (of 7kg)11.7lb to pack (of 15.4lb)
Frontier AirlinesCabin bag not on every fare	Too bigToo big	Too bigToo big	14.2kg to pack (of 15.9kg)31.3lb to pack (of 35.1lb)
Gol Linhas Aereas	Too bigToo big	No published limit	8.3kg to pack (of 10kg)18.3lb to pack (of 22lb)
IndiGo	Too bigToo big	No published limit	5.3kg to pack (of 7kg)11.7lb 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	10.3kg to pack (of 12kg shared with personal item)22.7lb to pack (of 26.5lb shared with personal item)
LATAM Airlines	Too bigToo big	Too bigToo big	10.3kg to pack (of 12kg)22.7lb to pack (of 26.5lb)
LufthansaCabin bag not on every fare	Too bigToo big	Too bigToo big	6.3kg to pack (of 8kg)13.9lb to pack (of 17.6lb)
Norwegian Air ShuttleCabin bag not on every fare	Too bigToo big	Too bigToo big	8.3kg to pack (of 10kg shared with personal item)18.3lb to pack (of 22lb shared with personal item)
Qantas	Too bigToo big	No published limit	5.3kg to pack (of 7kg shared with personal item)11.7lb to pack (of 15.4lb shared with personal item)
Qatar Airways	Too bigToo big	No published limit	5.3kg to pack (of 7kg)11.7lb to pack (of 15.4lb)
RyanairCabin bag not on every fare	Too bigToo big	Too bigToo big	8.3kg to pack (of 10kg)18.3lb to pack (of 22lb)
SAS	Too bigToo big	Too bigToo big	6.3kg to pack (of 8kg)13.9lb to pack (of 17.6lb)
Singapore Airlines	FitsFits	Too bigToo big	5.3kg to pack (of 7kg)11.7lb 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	6.3kg to pack (of 8kg)13.9lb 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	5.3kg to pack (of 7kg shared with personal item)11.7lb to pack (of 15.4lb shared with personal item)
VolarisCabin bag not on every fare	Too bigToo big	Too bigToo big	8.3kg to pack (of 10kg)18.3lb to pack (of 22lb)
VuelingCabin bag not on every fare	Too bigToo big	Too bigToo big	8.3kg to pack (of 10kg)18.3lb 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	8.3kg to pack (of 10kg)18.3lb 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 1.7kg3.7lb. Limits and sources. Own a different bag? Check it against every airline.