There are so many packing cube options available. Ultimately, you want to find ones that fit best in your luggage to maximize space. They come in different shapes, sizes and structured vs non-structured. The cubes easily stack inside the largest compartment of your luggage and can also be squeezed into small free spaces. While the garment folders (or packing envelopes) are structured and can be packed in luggage pockets or laid flat on top or bottom of the inside.
I started with an Eagle Creek Pack-It Specter starter set. It comes with three pieces, two unstructured cubes and a structured garment folder. This set is made of ultra-light silnylon ripstop which makes them durable and super light, I’m adding just over half a pound to my luggage when using them. The garment folder can pack more articles than the cubes. Also, they keep clothing wrinkle free with a structured bottom and includes a handy removable folding board. Rather, the cubes are perfect for rolling additional clothing and other smaller articles.
I purchased a wheeled duffel carry-on from Eagle Creek (similar to this one), as well, so my cubes fit perfectly inside. When searching for packing cubes, make sure the largest cube or folder dimensions fit inside your luggage. I found it’s easier to pack my cubes in different bags where as the garment folder only fits in my carry-on or larger luggage.
If you’re looking for a more versatile option, unstructured cubes are best because you can compress them to fit in most bags. If you have one piece of luggage you always use, try a structured garment folder that maximizes space and keeps your clothing wrinkle free.