I bought a set of Hippo Hands said to fit our Triumph bars, & mirrors etc. They measure a whopping 16" X 13". I expect they work great, but I've never used them.
I use a pair of 3 season gloves with silk liners that works for me down to the low 20s F. The Gerbing apparently does the rest. My large Memphis Fats windshield probably helps quite a bit too.
