I have a Richa which is.
The problem is water getting in at the neck.
All I have found at a reasonable price is Australian biker gear trousers, had those for years & have been totally dry even over 400+ miles a day of serious storms, I was going to buy the jacket to match but have since found out they are now made in asia & are nowhere near as good
My Richa leather is pretty good at keeping the water out even though it doesn't claim to be waterproof, the Richa textile jacket I had went in the bin as it leaked badly at the creases in the arms & wasn't comfortable when riding, I now have a Hein Gerike textile that's about as waterproof as a teabag but its warm & comfortable, I wear a Weise over jacket on top when needed, it packs down small when not, that was certainly the best £25 I have ever spent