OK, ok, OK …they are expensive and seem silly but I love them. They decrease the volume (but, sadly, not the weight) and they keep everything organized. When the kids were little, each kid got one small “cube” and they stuffed in all their shirts, PJs, underwear, pants. What didn’t fit in the little cube, didn’t go. At each stop, they got their cube and returned their cube … they were proud and independent. We had one less hassle. Buy them at stores like REI, travel stores, luggage stores, or on-line. (Yes, you can buy these too at Amazon).