12 manufacturer specification passports. Start with your operating airline, bag role and fare. A size candidate still needs packed measurements, packed weight and booking confirmation. These are source comparisons, not hands-on reviews.
Select an airline to compare. Specifications remain visible below.
Osprey Daylite Expandable Travel Pack 26+6
Fit needs verification
43 × 33 × 16 cm · empty weight 0.84 kg
Unexpanded 26 L, O/S; reviewed US product page. 26 L listed configuration only. Expanded exterior dimensions are unconfirmed; 6 L expansion cannot be converted into a guaranteed box. Packed protrusions still need measuring. Packed weight is not included in the comparison.
Osprey Daylite Carry-On Travel Pack 44L
Fit needs verification
55 × 36 × 23 cm · empty weight 1.06 kg
Manufacturer standard configuration on the reviewed page. Packed dimensions and inclusion of protruding handles are not independently measured. Packed weight is not included in the comparison.
Osprey Daylite Tote Pack 20L
Fit needs verification
43 × 38 × 21 cm · empty weight 0.534 kg
Manufacturer standard configuration on the reviewed page. Reviewed 20 L version; not the Large Tote Pack 26 L. Do not assume compression grants extra allowance. Packed weight is not included in the comparison.
CabinZero Classic Backpack 28L
Fit needs verification
39 × 29.5 × 20 cm · empty weight 0.6 kg
Manufacturer standard configuration on the reviewed page. Packed dimensions and inclusion of protruding handles are not independently measured. Packed weight is not included in the comparison.
CabinZero Classic Backpack 36L
Fit needs verification
45 × 31 × 20 cm · empty weight 0.7 kg
Manufacturer standard configuration on the reviewed page. Packed dimensions and inclusion of protruding handles are not independently measured. Packed weight is not included in the comparison.
CabinZero Classic Backpack 44L
Fit needs verification
51 × 36 × 18 cm · empty weight 0.76 kg
Manufacturer standard configuration on the reviewed page. Current reviewed specification is 51×36×18 cm. Older 55×40×20 cm versions are separate; confirm the actual item before purchase. Packed weight is not included in the comparison.
CabinZero Classic Tech Backpack 28L
Fit needs verification
39 × 29.5 × 20 cm · empty weight 0.713 kg
Manufacturer standard configuration on the reviewed page. Use the published cm specification. One inch-depth string is inconsistent; no fit is inferred from that string. Packed weight is not included in the comparison.
CabinZero Military Backpack 28L
Fit needs verification
43 × 30 × 16 cm · empty weight unconfirmed
Manufacturer standard configuration on the reviewed page. Empty weight unresolved: current page lists 905 g with an inconsistent pound equivalent; older Absolute Black page lists 825 g. Dimensions agree, but confirm version and weight. Packed weight is not included in the comparison.
Aer City Pack Pro 2 20L
Fit needs verification
44.5 × 30.5 × 18 cm · empty weight 1.243 kg
City Pack Pro 2 20L standard ballistic nylon; not X-Pac/Ultra or original City Pack Pro. Packed dimensions and inclusion of protruding handles are not independently measured. Packed weight is not included in the comparison.
Aer City Pack Pro 2 24L
Fit needs verification
46 × 30.5 × 18 cm · empty weight 1.297 kg
City Pack Pro 2 24L standard ballistic nylon; not ECOPAK/X-Pac/Ultra. Packed dimensions and inclusion of protruding handles are not independently measured. Packed weight is not included in the comparison.
Aer Travel Pack 4 28L
Fit needs verification
49 × 32 × 20 cm · empty weight 1.597 kg
Travel Pack 4 28L standard ballistic nylon; not Travel Pack 3 or 35L. Manufacturer cm/in figures have rounding differences. Comparison uses its cm specification; measure the actual packed bag. Packed weight is not included in the comparison.
Aer Carry-On
Fit needs verification
55 × 35 × 23 cm · empty weight 3.7 kg
Manufacturer standard configuration on the reviewed page. 55×35×23 cm manufacturer specification; handle/wheel inclusion needs confirmation. Not Carry-On Max or a universal airline approval. Packed weight is not included in the comparison.