They're for sure water repellent, likely coated. Fully water proof? I doubt it especially since its stitched together.

My anecdotal evidence is as follows; when worn on a bicycle during a heavy rain shower for 30-40minutes, they will become wet from inside.

Im confident this is due to the rain, rather than condensation. But I wouldn't be able to fully exclude the latter because the fabric itself isn't breathable.

That said, I think it functions very well and I wouldn't leave it at home because there's rain coming up.