I ordered an ASAT 3-d suit, and am now wondering about what to put underneath it for cold weather hunting.

I'm thinking of the revolution fleece pullover with 150 grams of thinsulate, over some equally insulated RF bibs, which are over a scent lok liner suit, a moisture wicking cold weather union suit and a single layer fleece pullover, both of these last two next to my skin.

For all day stand hunting down to 20 degrees or so, will I stay warm?