This heavy-duty fly mask from Professional's Choice is made of UV-protective nylon mesh to provide maximum protection against flies and other biting insects. To ensure comfort, the mask is designed with an especially smooth and breathable mesh around the ears and poll. The material is lightweight, stain resistant and breathable, while the polyester rip-stop technology makes it extremely durable. Strategically placed darts and lightweight design keep the mask off the eyes with no obstruction of vision. Hook and loop closure keeps the mask securely in place.