For what it’s worth I don’t own the fanatic, but I have the entire stratus system. I live and hunt in west central Illinois where temps during season can be 90 all the way down to -30 some years. I typically run hot in my opinion, but late October until mid November temps would be 60-35s during a hunt and I would run the pant, vest, with a fanatic hoody, and ua wool base layers and I was great. Once the temps got below 35 I would run the same setup except throw the jacket over the top. I ran that all the way into December. It got frigid with windchills in the -30s and I would run the same setup now paired with a puffy over the vest and hoody, but underneath the jacket. I was fine in those temps other than my hands. The system is extremely versatile and can handle a lot. I went out and sat in one of my stands in an open crp field on a 35mph gust with 20-25 sustained winds day during December with temps in the low teens to test the wind blocker and i don’t think it could be beat. I was comfortable. It’s an awesome system and I recommend it to anyone.