The Kentucky Horsewear Fly Mask Slim Fit is designed in a lycra fabric for a perfect fit as well as great comfort and protection for the horse. It is highly breathable and durable. The Fly Mask Slim Fit resembles a second skin to prevent insects from flying in and to offer the best comfort. The Fly Mask features a zipper, a press-button and an opening for the forelock. The extra strong mesh-eye covers avoid irritation of the eyes and doesn’t touch the horses eyes. When they invert by an action of the horse, they pop back out.