The Brooks Range Cirro Extreme jacket is a lightweight “no-nonsense” jacket made by a reputable company. I spent last summer using their Ultralight Quicktent and consequently I had high expectations for this jacket. After a winter season of rock climbing, skiing, and camping, this jacket was a constant companion in temps ranging from 40° to below freezing with a high wind-chill factor. The Cirro Extreme has ended up replacing all of the other jackets, both down and synthetic, in my closet.