I’ve had better luck staying warm in the outdoors with cotton hoodies than pretty much anything else. When they start to soak through I peel them off and exchange it for a dry one and repeat the process. Unless it’s a downpour I can’t function very well with a raincoat and I sweat like mad. Then I’m wet from the inside out. Rain gear also seems to keep you cold. I do have one fleece hoodie that sheds water slightly and is the warmer than the rest. This really works best for me in Western Washington’s climate.