Got these. They are good to mid 20's at best. Was out this am for 1 hour at about 28 degrees with 15 mph wind. thumbs and tops of hands were very cold by the time i got home. 5 degrees in these gloves would give you frostbite. I ride in all sorts of temps and no way would i venture out in these that cold. You get much better results with a lobster glove. Having said that I will say it is a quality glove for temps 25-40. It is not too bulky, has good wind resistance and flexibility and plenty of other good features. I have the castelli 5.0 also and if i had to pick i would take the mavic over those.