I've never understood packing cubes because they are bulky and heavy. I don't wonder at all now. Wandering around  a store one day, I saw this and thought it was worth a try. I bought it to pack some dressy clothes I was going to wear at a wedding. This little sack held the clothes for the wedding and the rehearsal dinner (pants, jacket and blouses - not a dress) and they arrived without needing ironing. I've used them for three trips now and just ordered three more. Instead of using a plastic grocery bag or the chaos method of packing, everything will now have its own bag.

Lightweight doesn't mean cheap or poorly made - it means a minimally designed, useful packing organizer.