The best fly mask for a horse is one that fits well and eliminates the ability for the flies to enter the eyes and ears of the horse. How to choose a fly mask for your horse?
As far as budget is concerned, I realize not everybody’s horse accessory budget is the same. If you need to buy 20 fly masks, spending $35 a pop for the ultra fancy...
The training level of your horse is important to consider. Add a floppy nose piece or noisy velcro and you’ll see how training can play a factor.
If you live in a really hot, humid climate, a fly mask with airflow is going to be more important.
There are lots of options on the market, it is up to you to choose the one that best suits your horses and your stable. If you want to mix it up, the world is your oyster, go for it!