These water-resistant packing cubes are designed with a breathable mesh that lets you easily find whatever top you need RIGHT THIS SECOND.
Promising review: "OK, first of all I came into this with low expectations. How on earth could fie 'smaller suitcases' make my suitcase have more space? Am I really that poor of a packer? Do the clothes really create THAT much chaos when they are just folded in there together? Are these people all just bad at life/packing/organization and so when they introduce the cubes, naturally their life improves and they give the things five stars? And yet, despite my skepticism, I am always looking to go up-level where possible with my travel experience, so I took the packing cube plunge just before my most recent work trip. And let me tell you -- it was WORTH IT. Yes, they hold the clothes together, yes they make it easier to fit more items into the same amount of space, yes packing will feel like a fun Tetris game that you'll want to keep playing, and yes it is all optimized forever and ever and you need these in your life." —sarahtellsitstraight
Get a set of five from Nordstrom for $70 (available in three colors).