I work for an equine Vet and have tried lots of fly control products to protect injured horses. Although, I have had issues with their fly boots and their customer service, nobody beats Cashel's masks. If you need to cover your horses ears, I wouldn't even consider any other brand as Cashel makes the only ears that truly move and flex with the horse's ears. Plus Cashel has now added elastic to the under jaw fastener making this mask even better. Kensington makes the only fly boots I would buy and their durability is superior to all, but the ears on their masks are just to stiff and large. The horse size Cashel mask is pretty generous. Even if you have a warmblood, you may want to consider a horse size. Better to have a close fit than a bunch of extra fabric.