I’m after a gilet to wear when warming up for cx races and for standing around on the start line waiting to go. I don’t really want a mesh back as I won’t be cycling properly in it and assume it would be too cold when waiting around. Max £50, waterproof would be nice but not essential
If it’s for warm up and standing about but not riding in, consider a montane prism vest or something similar with pertex and primaloft. Windproof, moderately warm and still warm when soaked through. I have the jacket version and love it.