I recently purchased Gerbings G3 gloves and a jacket liner. After the jacket liner arrived, we had an abnormally warm stretch of weather. Now we are experiencing abnormal cold weather. Sunday afternoon was cold (31 degrees), damp, and cloudy. I donned my Gerbings and my other riding gear. The jacket liner really puts out the heat. The liner was warm around my neck and back. The way the liner fits, it was not in contact with my front side.
Lesson number #1, wear a snug vest or shirt over top of the jacket liner to get heated from the front. The jacket liner really puts out the heat. The liner was warm around my neck and back. The way the liner fits, it was not in contact with my front side.
Lesson #2, be reasonable. At 70 mph, the hand and upper body was fine. But the vents on the head allowed the wicked damp cold in. Then there was the freezing feet. Add to this was riding farther than I should have, around 70 miles. My body was starting to get confused with very warm and very cold being experienced.
Ultimate lesson is that the Gerbings will make weather that I normally would ride in for short period or even longer rides more comfortable. Say a round trip ride to Champaign in the Mid-40s. They won't make me superman.