I used this to pack 2 base layers, 3 shirts, and 6 pairs of underwear. It worked very well at compressing everything into a small enough package to fit in my personal item carry on for budget airlines.
I honestly was really skeptical of these packing cubes and how much they cost, but after using them on multiple trips now, I can safely say that they are my ABSOLUTE FAVORITE packing cubes I've ever gotten.
They seriously hold so much clothes it's ridiculous, and the ability to expand/collapse is just incredible.
With the compression zip I can easily pack for 1-2 week trips using the small and medium cube combo. Love the "dirty side" compartment and the quick pull tabs
I bought the small and large cubes a few months ago and have used them a few times to hold 4 to 5 days worth of clothes (used in tandem). The compression zipper is a lifesaver when flying with just one bag. I had concerns about the zippers breaking or the stitching potentially popping but after a thorough check-up all of the stitching and zippers are in excellent condition. They were well worth the price.
Picked these up before a few weeks of traveling and they are my favorite packing cubes by far. The floating divider to separate clean and dirty clothes is a life saver, and helps keep me clean while I'm at my destination, as well as en route.
Have been struggling for years rummaging through my suitcase for various items and making a mess of things. With the packing cubes, one large, one small, I have solved my problem. I will not leave home without them. Great job, Peak Design!