“Expandability? Size Difference?
Also: None of the reviews seem to mention benefit o the expandability feature. How much does it increase
About a decade ago, I'd used a similar product (REI), as well as several brands of packing cubes. The quality of zippers, sewing - and the materials used - were all factors that influenced which pack-kits were most functional, especially when needed for frequent access.
The expandability provided by the zippers was amazing, but varied more by fabric and zipper-placement than by original size. So, please help us understand the basic/expanded capacities.
Again, I'll post this at both listings. ”
They expand 3".