I'm yet to test these in a downpour but in ordinary drizzle, they are definitely waterproof. The only downside is that they are slightly small. I bought a 2XL and they only just fit over my other trousers, which are sometimes XL and sometimes 2XL.
If, like me, you've been motorcycling for many years and are, let's say, much smaller than the average motorcyclist, you'll know how difficult it is to get clothing that feels comfortable, does the job properly and looks good. These waterproof over-trousers appear to tick all those boxes. Certainly the comfort, fit, look and feel are great. That said, I have not tested them out in the rain yet but I am very confident because I've seen a lot of waterproofs in my time and these look to be good quality with very well bonded seams. They also come in a useful little drawstring net back which is a nice touch.
Good price good quality excellent service thank you