For sitting treestands
Above zero:
Muck boots, smart wool socks, lightweight thermals (X-Scent), KOM Bunwarmer pants, Swandri wool shirt, Gray Wolf vest, and most important Hidden wolf bomber hat.
Below zero to -40 +/-:
Schnees or Mickey mouse boots, Mid-weight wool thermals, KOM Bunwarmers or Gray Wolf insulated bibs, Wool shirt (KOM, Filson, or Swandri), vest (varies between KOM reversible or fleece, bulk is the main concern), Gray Wolf or KOM jacket (the KOM is warmer but also bulkier), and most important, a light weight balaclava type hat (X-Scent) under either a HW or KOM bomber style hat (the KOM is warmer but you can't hear anything with the flaps down).
I wear lightweight cotton, wool, or fleece gloves with half of three fingers cut off on the shooting hand. They easily slide over my Damascus glove and to shoot normally, while still keeping the skin from being directly exposed to the air. I put a hand warmer in each pocket and toe warmers on top of my toes and on top of my shoulders as warranted. I had shoulder surgery and the toe warmer keeps the shoulders warm, allowing me to shoot more accurately on the first shot. A long time ago my scuba instructor told me that if you want warm feet then keep your head warm. For the most part that rule has worked to keep me warm.