I have eyeing this piece of jacket after running cold during a late season rifle hunt. I was sitting on a ridge at 9,000 feet at 23 degrees and winds between 5-10. Burr. I had about 4 layers of base layers, a Kelvin Vest, Kelvin Lite jacket, Cloudburst jacket, and then the Kelvin Down Hoody, medium base layer bottoms with Timberline pants, dew point pant covers and STILL cold. I really wish I had a set of this stuff for those couple of days. I get that this must be for a very specific use, but when I was cold like that, the price would not seem that much, I am sure. I await the next sale to get one for certain.
I could also imagine predator hunting, Coyote especially. With the coming snows, this jacket may get some use for me.
Thank you for the review OP, it was very helpful, especially the sizing discussion. I have learned with Sitka, go with your usual size and don't change it up, the boys are Sitka have already got it figured out.