I have both Ascent and 90% - really like both. The light weight and breathability is amazing with the Ascent pant. I will be getting at least one more pair for next year.I just got done talking to Mark Seacat (of Outdoorlife.com's Live Hunt and a Sitka Athlete). He swears by the Ascent pant and told me he wears them all season long. Just adds layers beneath during the late season. He particularly liked the breathability of this model.