Originally Posted by
PaulRivers
My showers pass waterproof/windproof jacket has a vent on the back.
There's a guy who would sew together custom winter gear who used to be talked about all the time here but I'm blanking on his name...
Foxwear. I've got a jacket like that and it's great. I also have a Garneau windvest with a mesh back that I really like, but neither of those are baselayers.