Funny you mention that, just got a fleece polartech layer today. Shopping for the waffle baselayers next.As someone who hunts in that temperature range in NE, I second the layering approach in general with backup base layer in case of perspiration moisture over chasing the trendy pricey flavor of the month. Milsurp polartec is one example of a great buy in the right role.
Btw, OP, found you here as I'm interested in purchasing your MR Divide pack for sale and currently I'm new here on the forum and trying to read through and understand the rules and limits on sending PM's and posting on classifieds I guess I'm locked out of that for now, but I'd purchase that from you if I can and can provide rep from other forums I'm a longtime member of.
That's why I like First Lite, super comfy and soft, never itchy, and super warm!I will always recommend Kuiu for hunting clothing because I have been super happy with them. This is the one area I have never used their products, however, because I have been running Craft brand base layers for years. Got them on discount from REI, believe they are more oriented towards cross country skiing, but the quality has been phenomenal for the price. I am super picky about wool because so much of it I find itchy and aggravating but have never had a problem with the Craft. Not sure what their current offerings look like, but they are worth checking out.