i live in minnesota. we used to say that the guys wearing this stuff were wimps. my brother let me try his out and now i will never be without my Gerbing heated liner. its funny how many people have never heard about them. how many of you ride with heat? we rode up to duluth minn and it was 90 deg F when we left home. got to the north shore and the temp dropped to 62 deg F. pulled out the liner and it was pure heaven. got mine on Ebay and paid half price for it. how many of you bike riders use heated jacket liners?