The bag is used for protected storage and transport of 2.5 hard drives. It is a stable hardcase (not soft shell), with a net on one side and an elastic band on the other inside, so you can also accommodate accessories (cables) with.
The format of the case is sufficient. I have tested it with several 2.5 drives from Toshiba and Seagate, all fit well into it. The zipper is relatively smooth and makes a robust impression.
For me, the bag serves its purpose, the processing is generally ok and the price money you can not find fault with currently around 6 EUR. The only negative point is that the case has a slight odor, but over time becomes less and I could tell even with a nearly identical competitor of mumbi equally. For the purpose of hard drive storage that for me ultimately plays a decisive role, therefore, of my (scarce) 5 stars.
Note too the product photos: The color of the bag is not quite as bright blue as the photos, rather normal blue real :)
