I just got home from a little over 100 mile ride. I left the house at exactly 5:15 and it was like 29*. I was averaging 80mph the whole time. The only problem I had was my hands. I don't have leather gloves yet so I was using my Joe Rocket ballistic gloves. I used 4 hand warmers in front shirt pockets, one in each gloves and one in each foot. I didn't leave early because it's a holiday. I figured the traffic won't be that bad. The amazing thing is that my chest was hot the whole time. Hands got cold but didn't hurt. Toes were fine. Just thought I'd share.