Just to add one personal experience I hunted a few weeks ago in Pennsylvania for whitetails. Temps in the upper 20s and a mild breeze. Started out with wool base layers, kuiu kenai as a mid layer and first lite puffy as my outer layer. While I really love the first lite for most of the hunting I do I was getting pretty cold alternating between sitting for an hour at a time and really slow still hunting in beteeen sits. Late morning I walked back to my truck and swapped the first lite for my Kifaru lost park parka and was truly surprised how much warmer it was. Felt 50% warmed at least. I really like both, the first lite is more packable and quieter and the kifaru is warmer and I like the marsupial pocket and the ability to buckle a pack through it and still keep my hands warm. Both great just different depending on your needs.
