Amazing how refreshing 38 degrees feel after 40. Once out of Chicago we were back up to speed, temperatures a little lower and out cooling vests started to work again. The temperatures continued to fall as we went into Wisconsin (they really hate their governor here :) ). At 35, the vests became too cold so we took them off. Helmets came off too for the first time on this trip. What a relief! Put them back on about 50Km later as the relief wore off and being pounded in the face by bugs at sunset stopped being fun.