You can't beat mesh jackets for summertime. It will encourage you to wear your gear, even when it's really hot outside. I'm using a Fieldsheer Mach One, and I really like it. Joe Rocket makes a mesh jacket that lots of people wear also. Make sure that it's well armored and that it fits well. It'll only be good for one fall, but it'll only cost around $100, so it's worth it, IMO.