If it helps, I've got a VR Trail Jacket and a Momentum jacket, both size M. I am fairly certain that the Momentum has exactly the same fit and dimensions as the Demand.
The VR fits me perfectly and layers quite comfortably under the Momentum. (Caveat - the VR jacket is this year's model and not at all baggy on me, even though it's an M and I'm only a 38" chest).
Posted: 09/11/2010 at 11:50