I'm already happy with the Sitka gear combined with the FL Furnance layers and it's not even daylight yet! I'm very comfortable in just two layers and it's 39 degrees down in the bottom. I also have my new alpaca wool socks on and can tell they were a smart purchase too. I'll even add the Fanatic vest or Stratus layers, but I'm friggin' sold on Sitka right out of the gate. Look forward to a few crispy morning sits to really test it out.