It is lightweight, I always have it in my backpack and I use it together with an umbrella so that the backpack doesn't get wet in case of rain with wind.

It perfectly covers the mil tec 40-liter bag, even with the molle pouch for a bottle. I haven't tested it yet in the rain to see its waterproofing, but at first glance, it seems like it will do the job.

Good quality and tested in a 36-liter backpack. It easily fits back into its case and takes up minimal space

In the photos, it is in a 100-liter bag. It is not big enough. Otherwise, it is the well-known Mil-Tec quality, good at a reasonable price.