I love everything about this jacket, how it fits, the function and how light weight it is. I wear this jacket almost every day. I don't know how it keeps you at the perfect temp, but it does. I have 2 dislikes. One is that it only comes in one solid color( I look like the grinch if I wear my Alturas pant and jacket at the same time) and the second is I wish it had at least one more pocket .