I live in SoCal and bought this for the winter, so have only had a couple of days to use it so far. That said, this is really nice wind vest. Super light and easy to pack. The whole back panel is stretch so it is not too hard to get into jersey pockets if needed. The back panel also really conforms to the body to potentially get a tight fit. The vest was a little tighter than expected, but that does mean that there is no flapping and totally aero. That being said it is a little tougher to zip back up while riding.
Great color, perfect fit, and well made. I am hooked on Ornot products!
In the desert we don't need extra layers often but when I do I reach for my House Wind Vest.