For the super frugal, Ikea has packing cubes.
At $5 for a set of 3 and $4 for one two sided cube, they are also super light. I had to try them. They didn't seem that sturdy at first but Ive used them on two short trips and I'm hooked.
I use the medium for pants, sweaters and gym shorts. A smaller one for undies, socks and masks. The two sided one for shirts.
Not sure how long the'll last but at that price I could replace them yearly.
The actual ones I bought were:
The Rensare Clothes bags ($5 for a set of three)
Rensare Clothes Bag with compartment ($4)
Rensare Accessory Bags (I use for electronics and misc items.) ($4 for a set of three)
Forfina 10 Piece Travel Set (toiletry bottles and kit) ($4)