What makes it so cool is that it's a high-activity piece. I vent a ton of heat out of my back when moving and sweating. If you stop, you should throw on a puffy or other shell/raingear anyway.True, I’m definitely not a product designer so I’m honestly not sure what the best options would be. I really do like the DWR and durability of the evo as primary layer. But the massive back panel can be a deal breakers in some cold windy situations as I don’t like to glass with my pack on.