Cabelas Revolution Fleece Pullover would be my suggestion. 150 grams of Thinsulate throughout with their Dry Plus Wind/Precipitation stopping liner. It is my first choice when the whether gets to be in the teens overnight and high 20's low 30's during the day. When it gets really cold then I opt for a Cabelas MT050 one piece insulated outfit. The Revolution Fleece pullover is not bulky and will definitely keep you warm.