There is lots of good brands. Some alot better t under armour.
Next to skin you want a layer that wicks away moisture.After you want an insulating layer than you want a shell.If you want the best of the best go to an industrial outlet or website that sells clothing to peole that work on the Gas pipelines and oil rigs up north.These guys work in minus 30 to minus 60 below.And are comfortable doing it cause of the clothing.If you got the money don't mess around go straight to these commercial and industrial grade garmats.it's just under garmats non of your hunting buddies are gonna know that you aren't cammoed from the inside out.I only care about how I look on the outside myself.