Insidious Sling

DEFY Insidious Sling is a 10.5L, 1.13kg2.5lb sling measuring 22.9×40.6×12.7cm9×16×5in. It fits the carry-on size limit of 36 of 36 major airlines and the personal-item limit of 11 of 26. Under the seat, its 40.6cm16in side is over the 40cm15.7in limit at 12 of the 15 airlines it misses. Specs from defybags.com, checked October 2026.

Volume: 10.5Lfixed size
Weight: 1.13kg2.5lb2.5lb1.13kg
Carry-on: 36/36airlines fit it
Personal item: 11/26under-seat limits

Dimensions: 22.9×40.6×12.7cm9×16×5in 9×16×5in22.9×40.6×12.7cm
Price: $278 as of October 2026
Laptop: up to 14"
Opening: three YKK AquaGuard zip compartments
Warranty: No fixed term Defects in materials and craftsmanship for the original owner; paid repairs for wear and tear.
Compartments: 3
Bottle pockets: n/a

Organizer
Water-resistant
Shoulder strap (removable)

Material: 1050D water-resistant MIL-SPEC ballistic nylon exterior, 1000D water-resistant silver CORDURA lining, YKK AquaGuard zippers

Padded tech pocket fits up to a 14 in MacBook Pro
Removable, reversible strap with AustriAlpin COBRA buckle
Also sold in Black TexWax canvas, Black X-Pac, Rogue Camo CORDURA and Horween leather editions

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

Does the DEFY Insidious Sling 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	5.9kg to pack (of 7kg)13lb to pack (of 15.4lb)
Air CanadaCabin bag not on every fare	FitsFits	FitsFits	No published limitNo published limit
Air FranceCabin bag not on every fare	FitsFits	Too bigToo big	10.9kg to pack (of 12kg shared with personal item)24lb to pack (of 26.5lb shared with personal item)
Air India	FitsFits	No published limit	5.9kg to pack (of 7kg)13lb to pack (of 15.4lb)
AirAsia	FitsFits	Too bigToo big	5.9kg to pack (of 7kg shared with personal item)13lb 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	FitsFits	No published limitNo published limit
American Airlines	FitsFits	FitsFits	No published limitNo published limit
ANA (All Nippon Airways)	FitsFits	Too bigToo big	8.9kg to pack (of 10kg shared with personal item)19.6lb to pack (of 22lb shared with personal item)
AviancaCabin bag not on every fare	FitsFits	No published limit	8.9kg to pack (of 10kg)19.6lb to pack (of 22lb)
British Airways	FitsFits	FitsFits	No published limitNo published limit
Cebu Pacific	FitsFits	Too bigToo big	8.9kg to pack (of 10kg shared with personal item)19.6lb 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	FitsFits	13.9kg to pack (of 15kg)30.6lb to pack (of 33.1lb)
Emirates	FitsFits	No published limit	5.9kg to pack (of 7kg)13lb to pack (of 15.4lb)
Frontier AirlinesCabin bag not on every fare	FitsFits	FitsFits	14.8kg to pack (of 15.9kg)32.6lb to pack (of 35.1lb)
Gol Linhas Aereas	FitsFits	No published limit	8.9kg to pack (of 10kg)19.6lb to pack (of 22lb)
IndiGo	FitsFits	No published limit	5.9kg to pack (of 7kg)13lb to pack (of 15.4lb)
JetBlue Airways	FitsFits	FitsFits	No published limitNo published limit
KLMCabin bag not on every fare	FitsFits	Too bigToo big	10.9kg to pack (of 12kg shared with personal item)24lb to pack (of 26.5lb shared with personal item)
LATAM Airlines	FitsFits	FitsFits	10.9kg to pack (of 12kg)24lb to pack (of 26.5lb)
LufthansaCabin bag not on every fare	FitsFits	Too bigToo big	6.9kg to pack (of 8kg)15.2lb to pack (of 17.6lb)
Norwegian Air ShuttleCabin bag not on every fare	FitsFits	Too bigToo big	8.9kg to pack (of 10kg shared with personal item)19.6lb to pack (of 22lb shared with personal item)
Qantas	FitsFits	No published limit	5.9kg to pack (of 7kg shared with personal item)13lb to pack (of 15.4lb shared with personal item)
Qatar Airways	FitsFits	No published limit	5.9kg to pack (of 7kg)13lb to pack (of 15.4lb)
RyanairCabin bag not on every fare	FitsFits	Too bigToo big	8.9kg to pack (of 10kg)19.6lb to pack (of 22lb)
SAS	FitsFits	Too bigToo big	6.9kg to pack (of 8kg)15.2lb to pack (of 17.6lb)
Singapore Airlines	FitsFits	Too bigToo big	5.9kg to pack (of 7kg)13lb to pack (of 15.4lb)
Southwest Airlines	FitsFits	No published limit	No published limitNo published limit
Turkish Airlines	FitsFits	Too bigToo big	6.9kg to pack (of 8kg)15.2lb to pack (of 17.6lb)
United AirlinesCabin bag not on every fare	FitsFits	FitsFits	No published limitNo published limit
Vietjet Air	FitsFits	Too bigToo big	5.9kg to pack (of 7kg shared with personal item)13lb to pack (of 15.4lb shared with personal item)
VolarisCabin bag not on every fare	FitsFits	FitsFits	8.9kg to pack (of 10kg)19.6lb to pack (of 22lb)
VuelingCabin bag not on every fare	FitsFits	Too bigToo big	8.9kg to pack (of 10kg)19.6lb to pack (of 22lb)
WestJetCabin bag not on every fare	FitsFits	Tight fit (0.4cm spare)Tight fit (0.2in spare)	No published limitNo published limit
Wizz AirCabin bag not on every fare	FitsFits	Too bigToo big	8.9kg to pack (of 10kg)19.6lb 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 1.13kg2.5lb. Limits and sources. Own a different bag? Check it against every airline.