I was just wondering about the "dress code" at schooling shows. I am hopefully going to go to a few this summer and I already have tall boots and breeches to wear, but I am still in the market for a show shirt and coat. I have never been to a show before and it's likely after this Summer it will be a while until I can go to any more (I don't own the horse I will be riding, and the person who does is moving in late August and taking her horse with her.) So I don't want to invest a lot of money in something that I will only need to use two or three times.
So my question is, do I need a "proper" horse show shirt? Or could I just use a white oxford style shirt that I already have under a hunt coat? As I said, it won't be at a rated show or anything, just a schooling show, so would this be an okay thing to do, not not? Since these will be my first shows, I am not sure of the dress code and I don't want to do anything wrong.
So what's suitable attire and what's not in general at schooling shows?