My one mare used to destroy fly masks when I first got her. She went through 2 different fly masks in a week before I tried this. She has been wearing this fly mask for 2 years now and it’s held up phenomenally. She even got it caught in a fence gate and tore the nose off and there was hardly a blemish in the nose. I just got another one of these for my other horse who is In a pasture with friends who love to chew and I am not worried what so ever about it getting ruined. They are very breathable and the colors are easy to see through and they stay off the eyes super well. I have never had a problem with these masks and have no complaints.