Since I'm in California it's never that big of an issue, esp. for JMT but I'm more satisfied with a less expensive (e.g., REI) jacket knowing that after a certain amount of wear with the backpack/straps etc. it is just going to get trashed anyway.? So, enough to keep me dry in heavy downpour, plus I use my rain jacket as one of my layers in my overall system.? Seen others mention ponchos etc. to keep ventilated and I always get jackets with pit zips so I can pull my arms out of the jacket and unzip the front to regulate.? Look a bit like a spider while doing so but find that works best for me.
