I froze my fingers years ago because I didn’t have good enough gloves while riding in really cold weather, like below 10 degrees. So now I use both heated grips & Gerbing heated gloves. The heated grips work very nicely on those cool days with light weight gloves. But when gets below 50 the gloves & grips work nicely together. The gloves are a little tricky to get on & sleeves tucked in, but once in place they work well. I just took a trip in the middle of November from Iowa to Oregon & my hands stayed comfortable the whole way and there were several hours of below freezing temperatures. I ride an 87 Royale & with a full Gerbing suit & heated grips running, my voltage does run close to 12. But I have my suit connected to the Gerbing thermostat so I can turn down the heat on the pant/socks or jacket/gloves just a little & voltage stays up all day long. I woldn’t leave home without them.