My feet is the only problem I have. I use winter MB shoes (Diadora) that is one size bigger with a thin silk sock and a thick smart wool sock over that. When the temps get below 25 my feet are good for an hour before they start getting cold. Another 30 minutes and they're really cold and painfull. Anything in the teens or lower I'll limit my ride to one hour or less. I have booties but they're for the road and don't fit well over the Diadora's. The rest of the body is fine no matter the temp.