Cloudveil Rayzar Gore Windstopper Softshell Jacket - Men's - 2009 BCS

It has no insulation at all, so unless it's at least 50 out, I'd say you need to layer.

it has insulation similar to a lite fleece.

The hood is not removable and this jacket is windproof and has a hood and the serendipity does not.

This is guaranteed windproof. The serendipity is very very wind resistant, but has a wool/poly blended fabric so it will be warmer. Both jackets are very water resistant as well; you could run water over them for hours and it wouldn't go through. No removable hood, but the rayzar's hood is two way adjustable.

k buzz, the biggest difference is the Gore Windstopper face fabric. it is a bit heavier, and obviously more windproof and waterproof than the fabric on the first turn which is a true stretch woven, no membrane/laminate. and the hood is helmet compatible. hope this helps

the rayzar is helmet compatible. first turn is for warmer and drier weather, but it'll do high 40's in a good rain.

It has a Gore laminate that should keep you dry from outside moisture, even on wet days. That being said, it is still a softshell. I use softshells, including this one, about 95% of the time I am outside. I carry a lightweight hardshell in my pack when climbing. For riding/skiing I use a hardshell when it is going to be solidly precipitating above freezing.