Packing cubes add weight and depth to a cabin trolley, and two of the three sets compared here list a set weight, which is 0.22 kg for Mokobara and 0.45 kg for Nasher Miles. Air India limits an Economy cabin bag to 7 kg.
A traveller filling a 55 cm cabin trolley for a 3 to 4 day trip has to decide whether cubes help or only add to the load. Brand pages give weights, dimensions and fabrics, and none of them gives a measure of space saved.
Weight against the cabin limit
Air India lists the Economy cabin limit as 7 kg, with a size of 55 x 40 x 20 cm and the three sides together under 115 cm. Every gram of cubes comes out of the same allowance that covers the case and its contents.
Mokobara lists its Set of 4 at 0.22 kg. Nasher Miles lists its Set of 4 at 0.45 kg, which is about twice as much. If both figures describe four cubes, the heavier set uses 0.23 kg more of the allowance, a result of simple subtraction of the two listed weights.
The Nasher Miles page needs care. Its description appears to cover the seven cube set, so the listed weight and size may belong to that set and not to the four cube set. The Postbox lists no weight for its set at all.
Depth against the case
How cubes sit in a case depends on their thickness. Mokobara lists 10.16 cm for every cube in its set, and Nasher Miles and The Postbox each list 10 cm.
Two layers of cubes take about 20 cm. That equals the shortest side in the Air India cabin size, and it is more than the usable interior of a slim case. The brands do not state interior depth for any case, so the arithmetic is only a guide.
A shallow interior leaves room for a single layer of cubes, while a deeper interior leaves room for two layers. The number of cubes in a set can be chosen to match that depth.
Nasher Miles says its set folds flat, and The Postbox calls its cubes collapsible, so both can be packed away when empty. The Mokobara page does not describe either feature.
Solid exterior or transparent mesh
Mokobara describes a water resistant exterior and does not name the fabric. Its set has two extra large cubes, a large cube and a medium cube, with the extra large size at 38 x 27 cm.
Nasher Miles names high density polyester for the outer fabric and lists reinforced stitching and anti theft zippers. The set is described as folding flat and carries a 12 month warranty against manufacturing defects. Availability of the Set of 4 and the Set of 7 was unclear in November 2026.
The Postbox takes the other approach. Its cubes are lightweight nylon mesh with YKK zippers, a transparent mesh top, a handle on each cube and a collapsible build. A traveller can see the contents without opening a cube.
Four sizes are listed by The Postbox, running from a small of 26 x 11 cm to an extra large of 32 x 26 cm. Figures for its large size look inconsistent with the medium, so they are left out here. Individual sizes are also sold.
Details each listing states
Fabric is named by Nasher Miles as high density polyester and by The Postbox as nylon mesh, while Mokobara describes only a water resistant exterior. Warranty is stated by Nasher Miles alone, and Mokobara says plainly that it offers none on packing cubes. The Postbox page lists no warranty.
Set weight is the detail that varies most. Mokobara gives a clear figure, Nasher Miles gives one that may belong to a different set, and The Postbox gives none. A reader comparing the three on weight can therefore compare only two of them, and with a caution on one.
Zips are described in two ways: Nasher Miles lists anti theft zippers, and The Postbox lists YKK zippers.
What the pages say about contents
Nasher Miles gives capacities in its description. A large cube holds 10 to 12 shirts or 5 to 6 jeans, a medium cube holds 3 to 4 shirts, and a small cube holds 5 to 6 pairs of socks. The description appears to cover the seven cube set, so the counts for the four cube set are unclear.
The Nasher Miles page also lists clothes, toiletries, shoes, electronics and gym gear as suitable contents. Mokobara and The Postbox give no capacity counts of this kind.
None of the three pages describes a compression feature. The pages describe the cubes as a way of keeping items sorted. For a short trip, the comparison then rests on weight, depth and exterior, which are the details the brands do publish.
Mokobara suits a traveller who wants a light set sized to fit its own luggage and does not need compression. Nasher Miles suits a traveller who wants a warranty and a named polyester fabric. The Postbox suits a traveller who likes breathable mesh and wants to see the contents.