I have a bike with alloy brifters that get very cold during winter season riding. I wear a nice pair of gloves and the cold comes right through because my hands are wrapped around them and usually in constant contact with some part of the alloy brake lever or the alloy shift paddle (Rival 22 Hydro). This gets uncomfortable, as I'm sure many others have found while riding in the cold.
This is not a problem at all when I'm riding my bike with carbon and/or plastic brifters.
I know why this happens and my question is what and how can I wrap the levers with in order to mitigate the conduction from them to my fingers in cold weather?
I'm concerned with interfering with the motion of the paddles and levers. I don't want them to be sticking or missing shifts because there is some bulky tape wrapped around them.
Are there any materials and methods others have used successfully? Also, I'm not really interested in bar mits as a solution.