The Hellium II rain gear is nice. I've worn in several rain storms, one with torrential rain, and stayed dry. There is some better stuff as far as breathability goes, but for the price difference, I can't really complain. When there is a nice breeze it breaths well, but on calm rainy days, I imagine I may sweat a little bit.

Really would like the Zpacks Challenger rain gear, just could not justify spending the money after purchasing the duplex.