Tested since spring '22, fully waterproof for me, with several good rains under its belt here in Northern Greece. Internal lining to avoid scratches and elastic at the front and back for tightening. For size, I wanted the images to help; it just covers a Kymco Agility 300 with the case for a regular helmet, while without the case it is fully covered. Lightweight, folds easily, and still no signs of wear from almost daily use and quite a bit of sun exposure during the summer. I would prefer it to have holes at the front for the forks, but okay.

Upd Nov 2023.
I retract the fully waterproof claim; when in contact with a surface (e.g., case) and left wet for many hours, water will seep through the material. Otherwise, still no tears with daily use, very durable, but with a lot of wind, it might blow away.

Upd May 2025.
Everything is fine and still in very good condition - the above still applies. Let me note, though, that in my case, it only sees the sun for about 2 hours in the morning.

Overall, very satisfied.

Uploading 2 more images with the current condition.

(P.S. The straps are a hack for when it's windy)