I have had bad luck with both kuiu and harkila for waterproofness. One client in particular wearing a kuiu katana got really wet after being out in the rain with me for an hour, the jacket was about a month old. I have a couple of harkila Stornaway coats which are far more waterproof than their prohunter ranges which basically turn into a sponge as they age. If you don’t care about looking cool in a branded jacket look at kaiwaka clothing.