I've used the Epic Jacket for many trips to the North Cascades where the rain showers last for hours. The jacket has always kept me dry, and its well ventilated. The Epic is lightweight (less than 1lb) and doesn't take up much room in my pack. My only complaint with coat is that the zipper has gotten caught on the fabric a few times on the pit vent. Other than that, it's been an outstanding rain coat.