Review (5/5): Worth the money.  Bought several.
Lets be clear; these aren't 50 dollar bags. BUT, they are surprising well made, and a great value. I use several sizes of these to hold tools, cables, adapters, etc. I got tired of fabric and canvas pouches because it was to hard to discern what each bag held. These are sooooo much more useful.
The pouch is relatively thin plastic, maybe 2-3 times thicker than a heavy Zip-Loc bag. Doesn't puncture too easily, but be careful of sharp objects inside the bag.