Will have to wait for fall, and winter to test out how warm these are. Perfect fit, very comfortable, and excellent quality. I don't expect to be disappointed with these.

Loved the first one I had to buy another!! I will buy a few more in different colors too

Great

Awesome garment. Will be ordering more

Fits great, warm, would buy again

This sweater did well early spring in MN while turkey hunting. It was cool enough outside to need it and it did not trap sweat during walks through hill country. I’m confident this will be my primary outer layer during the fall bow hunting season. A medium would fit perfectly (5’8”,175 lbs), but a large is comfortable with an under layer. Sleeves were not tight like other first lite products. No different weight/bulk than a heavy sweatshirt.

I was Lucky I had this in my truck when I showed up for a May fishing trip and it was much colder than expected. It was a great layer to add that kept me much warmer than expected given it's size and weight. It doesn't hurt that it looks good too.

Excellent fit, great quality and super warm!!

This shirt is a GREAT mid-layer shirt. It’s extremely warm and very comfortable! I wear this as my only mid layer under my shell or puffy jacket in cold conditions and it makes a great top layer for cooler/cloudy days. I highly recommend the Furnace!

Fit as described and comfortable. I use it with another tiny merino layer below. Could be smaller at the waist.