Are you talking about for windy days and such? Its not waterproof but it protects from the wind and sun. My Morab mare wore it the first day I bought her for a 4hr trailer ride with an open stalk trailer on a cold day and she stayed toasty. I'll take lots of pictures tomorrow for you of the pad and of the sheet.
I just looked at the pictures of your mare, and well if she goes missing she's not in with my Morab. LOL.