These masks are a perfect fit, comfortable and large enough to cover the whole face and chin easily. They have foam on the inside and this holds it a bit away from your face, this prevents steaming and sweating. They are thick strong plastic and the head band is very strong. Perfect for any Op. Recommended. I bought 4. The only thing is that the Paint Job is a tiny bit off on one of them but it's only noticeable by myself. Other than that these are the best Anon masks on Amazon.