Wear polypropelene long under wear,then polar fleece or wool pants,and heavy wool sweater...then I have camo insulated bibs.. finish with good windstopper lined fleece coat or wool coat.On my head I put fleece bacalava on and on bottom sorrel heavy insulated boots with footwarmers added.I hunted in 12 f temps in my ground blind several times the last week for about 3 hrs.No problem and bulk is not bad.Also the wind has been howling.....Have not seen the deer though they have been nocturnal on me the last few days...I think the full moon..may try a spot and spook,oops,stalk, later today..good luck and stay warm...the middle layer of wool has really helped me in the cold.My first year using wool,most tradgangers swear by it,it has been a huge help.Bought my sweaters at goodwill store,5 bucks each,good ones too..LL bean,woolwrich etc.. Ricky