I bought these liners to use underneath my winter leather motorcycle gloves. For stop and go use in 30 degree weather they performed well. When I got on the highway and got up to cruising speed it didn't take long for my hands to get numb. I'm not saying they are not good but they just didnt keep my hands as warm as I would have liked. I don't know that anything out there can do the job when your riding your motorcycle in freezing weather.