I don't understand why there are no reviews for this excellent product. I have used it down to 17 degrees F plus wind chill with a Merino base layer and was never cold or uncomfortable riding trails and singletrack. An interesting side effect is that it seems to regulate my core temperature so never too hot or too cold. Liked it so much I also bought the Freezing point II jack. Have not tried it yet but expectations are high. I was disappointed in in FS-260 Primo glove though....did not keep my fingers warm at all...