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?