Warm and a nice pad. The water resistance thing is alright initially but I can never be arsed to maintain it. I rode below zero in them last year and was fine, didn't make a regular habit of it as I've got warmer tights but while they were dirty the Nanoflex were ok. 4/5 degrees should be fine but it depends how you feel the cold. If you really notice it then the Sorpasso Wind are ridiculously warm and have a very nice pad, but they're also noticeably more restrictive than the Nanoflex when you're pedalling.