This is the best running gear purchase I have ever made. Great warmth with no extra weight. Seams are very comfortable, not always the case with a compression tight. I wear these not only for running (October thru March), but as a base layer for cross country and downhill skiing, snowshoeing and hiking. I have had these pants now for 2 years now, wear them multiple times per week and am not fussy about laundering them in a particular fashion and they are still like brand new!!! This is the first time I have ever written a review for anything because I am that impressed.