I said this for the Down Sweater too, but definitely anyone who spends any time outdoors any time of year should own a piece of Capilene 3. Keeps you dry when you're moving and sweating, and keeps you warm when you're not. I wear it on it's own in the fall for mountain biking, all winter long under my ski jacket, and take it on every camping trip during the summer to wear at night. It's amazing
This review was written in the old system and had content requirements that are different than reviews written today.