Love these packing cubes. They feel like quality and have a lifetime warranty. The three peice kit comes with the extra small, small, and medium cube; some people call them the quarter, half, and full cube. I also bought the slim cube as part of the bundle. See my photos. There is also a large "double cube" you can buy separately.

Pay attention to the mesh on packing cubes, they are the first to go or get snagged. These Eagle Creek Pack-It cubes have a fine mesh that doesn't eaisly get caught or snagged. The next area to look out for are the seams; they have to handle being stuffed and pulled. The Pack-It cubes seams look up to the job but I'll need more time to judge that. The last thing to check are the zippers, they need to be smooth and not get hung up when over stuffed. Even though they aren't YKK zippers the zippers are amazingly smooth. Eagle Creek did an excellent job with the design and testing.

I really like how packing cubes help you organize your bag. They also makes it easy to swap out clothes without tearing apart your suitcase. Lets you get in and our quick. I supplement my cubes with one Pack-It medium garment folder. With 4 cubes (extra small, small, medium, and slim) and the medium Pack-It folder I can pack enough clothes for 2 weeks in a 22" carry on and still have left over room for things. I like to use the cubes for non dress cloths and the folder for slacks and button up shirts.