I wore it in a short down pour (with a backpack so my back was dry accept sweat...) and I was really surprised by the waterproofing on the front. Not sure how it would last in a long downpour though. And then without a backpack you'd get a wet back... I don't think the back is waterproof is it?
How does PT Jacket bear with torrential rainfall?
(not a buying in sale question, already have one and love it just never worn in proper rain)