HoldenPartsUSA Face Masks are constructed of two layer comfortable elastic fabric. Made of 180g elastic polyester and 180g silk spandex polyester. The silk fabric, also called ice silk, is smooth, cool, and comfortable. It gives you a nice and cool feel in the hot summer heat. The 3D design makes it more fit to your face. It is soft, breathable, and comfortable to wear all day to protect your mouth and face from dust, ash, pollen, grass, vehicle exhaust, passive smoking, and other airborne pollutants.