I decided to try this because it was less expensive than some name brand merino wool base layers that i have owned. I’ve worn it a couple of times at the time of this review. I can report that it feels light and helped to keep me warm, as a base layer should. It is not quite as soft as Smartwool base layers that i have used, but it is comfortable and not itchy. Exercise and weather conditions are too variable for me to offer a scientific comparison of which brand is warmer. Too early to comment on durability at the time of this review.