Whats that white weaner on its nose?
WHat does it do?
Basically if the horse puts their head up, the shadow roll blocks their vision so they lower their head again, it’s meant to prevent the horse raising it’s head. They can also be used for padding on the noseband or are also a fashion statement at the moment.
(Disclaimer - in saying all this I have no idea why the horse in the photo is wearing one)