Series 2 Large Expandable Pack

Knack Series 2 Large Expandable Pack is a 30L, 1.5kg3.3lb travel backpack measuring 55×36×11cm21.5×14×4.5in. It fits the carry-on size limit of 28 of 36 major airlines and the personal-item limit of 0 of 26. Under the seat, its 55cm21.7in side is over the 40cm15.7in limit at 12 of the 26 airlines it misses. Specs from knackbags.com, checked September 2026.

Volume: 30Lexpands to 46L
Weight: 1.5kg3.3lb3.3lb1.5kg
Carry-on: 28/36airlines fit it
Personal item: 0/26under-seat limits

Dimensions: 55×36×11cm21.5×14×4.5in 21.5×14×4.5in55×36×11cm
Price: $295 as of September 2026
Laptop: up to 17"
Opening: n/a
Warranty: not published
Compartments: n/a
Bottle pockets: 1

Price history

$295 at every weekly check since Oct 5, 2026 (3 checks).

Checked weekly on the brand's US store.

Organizer
Water-resistant
Hip belt (removable)
Sternum strap (removable)
Luggage pass-through (hideable)

Material: 420D high-density nylon with PU coating, 840D ballistic nylon base

Hidden expandable suitcase compartment adds 16L
Zip-away shoulder straps
Lockable zippers on main and suitcase compartments
RFID-blocking lining

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

Does the Knack Series 2 Large Expandable Pack 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	5.5kg to pack (of 7kg)12.1lb to pack (of 15.4lb)
Air CanadaCabin bag not on every fare	Tight fit (no spare)Tight fit (no spare)	Too bigToo big	No published limitNo published limit
Air FranceCabin bag not on every fare	Too bigToo big	Too bigToo big	10.5kg to pack (of 12kg shared with personal item)23.1lb to pack (of 26.5lb shared with personal item)
Air India	Tight fit (no spare)Tight fit (no spare)	No published limit	5.5kg to pack (of 7kg)12.1lb to pack (of 15.4lb)
AirAsia	Tight fit (no spare)Tight fit (no spare)	Too bigToo big	5.5kg to pack (of 7kg shared with personal item)12.1lb to pack (of 15.4lb shared with personal item)
Alaska Airlines	Tight fit (no spare)Tight fit (no spare)	No published limit	No published limitNo published limit
Allegiant AirCabin bag not on every fare	Tight fit (no spare)Tight fit (no spare)	Too bigToo big	No published limitNo published limit
American Airlines	Tight fit (no spare)Tight fit (no spare)	Too bigToo big	No published limitNo published limit
ANA (All Nippon Airways)	Tight fit (no spare)Tight fit (no spare)	Too bigToo big	8.5kg to pack (of 10kg shared with personal item)18.7lb to pack (of 22lb shared with personal item)
AviancaCabin bag not on every fare	Too bigToo big	No published limit	8.5kg to pack (of 10kg)18.7lb to pack (of 22lb)
British Airways	Tight fit (1cm spare)Tight fit (0.4in spare)	Too bigToo big	No published limitNo published limit
Cebu Pacific	Tight fit (no spare)Tight fit (no spare)	Too bigToo big	8.5kg to pack (of 10kg shared with personal item)18.7lb to pack (of 22lb shared with personal item)
Delta Air Lines	Tight fit (no spare)Tight fit (no spare)	No published limit	No published limitNo published limit
easyJetCabin bag not on every fare	Tight fit (1cm spare)Tight fit (0.4in spare)	Too bigToo big	13.5kg to pack (of 15kg)29.8lb to pack (of 33.1lb)
Emirates	Tight fit (no spare)Tight fit (no spare)	No published limit	5.5kg to pack (of 7kg)12.1lb to pack (of 15.4lb)
Frontier AirlinesCabin bag not on every fare	FitsFits	Too bigToo big	14.4kg to pack (of 15.9kg)31.7lb to pack (of 35.1lb)
Gol Linhas Aereas	Too bigToo big	No published limit	8.5kg to pack (of 10kg)18.7lb to pack (of 22lb)
IndiGo	Too bigToo big	No published limit	5.5kg to pack (of 7kg)12.1lb to pack (of 15.4lb)
JetBlue Airways	Tight fit (no spare)Tight fit (no spare)	Too bigToo big	No published limitNo published limit
KLMCabin bag not on every fare	Too bigToo big	Too bigToo big	10.5kg to pack (of 12kg shared with personal item)23.1lb to pack (of 26.5lb shared with personal item)
LATAM Airlines	Too bigToo big	Too bigToo big	10.5kg to pack (of 12kg)23.1lb to pack (of 26.5lb)
LufthansaCabin bag not on every fare	Tight fit (no spare)Tight fit (no spare)	Too bigToo big	6.5kg to pack (of 8kg)14.3lb to pack (of 17.6lb)
Norwegian Air ShuttleCabin bag not on every fare	Tight fit (no spare)Tight fit (no spare)	Too bigToo big	8.5kg to pack (of 10kg shared with personal item)18.7lb to pack (of 22lb shared with personal item)
Qantas	Tight fit (no spare)Tight fit (no spare)	No published limit	5.5kg to pack (of 7kg shared with personal item)12.1lb to pack (of 15.4lb shared with personal item)
Qatar Airways	Too bigToo big	No published limit	5.5kg to pack (of 7kg)12.1lb to pack (of 15.4lb)
RyanairCabin bag not on every fare	Tight fit (no spare)Tight fit (no spare)	Too bigToo big	8.5kg to pack (of 10kg)18.7lb to pack (of 22lb)
SAS	Tight fit (no spare)Tight fit (no spare)	Too bigToo big	6.5kg to pack (of 8kg)14.3lb to pack (of 17.6lb)
Singapore Airlines	FitsFits	Too bigToo big	5.5kg to pack (of 7kg)12.1lb to pack (of 15.4lb)
Southwest Airlines	FitsFits	No published limit	No published limitNo published limit
Turkish Airlines	Tight fit (no spare)Tight fit (no spare)	Too bigToo big	6.5kg to pack (of 8kg)14.3lb 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	Tight fit (no spare)Tight fit (no spare)	Too bigToo big	5.5kg to pack (of 7kg shared with personal item)12.1lb to pack (of 15.4lb shared with personal item)
VolarisCabin bag not on every fare	Tight fit (no spare)Tight fit (no spare)	Too bigToo big	8.5kg to pack (of 10kg)18.7lb to pack (of 22lb)
VuelingCabin bag not on every fare	Tight fit (no spare)Tight fit (no spare)	Too bigToo big	8.5kg to pack (of 10kg)18.7lb to pack (of 22lb)
WestJetCabin bag not on every fare	Tight fit (no spare)Tight fit (no spare)	Too bigToo big	No published limitNo published limit
Wizz AirCabin bag not on every fare	Tight fit (no spare)Tight fit (no spare)	Too bigToo big	8.5kg to pack (of 10kg)18.7lb 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 1.5kg3.3lb. Limits and sources. Own a different bag? Check it against every airline.