This is a shockingly warm jacket for its weight. I never dreamed it would keep me as warm as it does. On super cold days in the 20s and below, I wear my Janji storm runner jacket over it to block the wind and elements and I’m good! The only thing I miss with this new thermal runner insulated jscket is the little snap closure 3/4ths of the way of the zipper, which allowed me to unzip when I got warm, but still keep it attached and from flopping around off my shoulders too much. It’s not a dealbreaker, but I would love it if that was brought back! I remember some people asking for pockets because the old one didn’t have front pockets… I didn’t mind that so much because it had an inner drop in pocket. To each their own, I guess! But I preferred the snap at the top over the outside pockets. Either way, it’s a sleek design, and I love it for warmth – it’s the best thing I’ve ever purchased for winter running!