After many years of avoiding wearing a jacket at comps by only doing associate dressage or freshmans, I have a few showjumping comps coming up that I need to wear a jacket to. I have one but it is wool and is way too warm to wear in summer. So I'm looking for a black jacket that is light weight, breethable, machine washable and not too expensive (say under $150). I am happy to either buy a second hand one (i'm a 10/12) or a new one off the internet if someone knows of somewhere to get one.

Thanks