Just wanted to share my experience with a pair of winter pants I bought on amazon. I have rode with these pants for about a month in as low as 27° and with a pair of padded shorts under I was perfect, no sweating. In 40° weather I tried with short and I was a bit hot in the crouch but legs were fine, maybe if I tried with padded briefs it would have been better but those haven't arrive yet. No wind gets through them. Check them out, for the price you CAN'T go wrong.
I did burn a little hole in the pants as I tried to wash then dry them in low twice cause I wanted to ride that evening, so best bet wash and hang dry if your not rushing.