Features extreme heat resistance, will not melt, drip or ignite at 350° for five minutes, adjustable side vents to ensure increased air flow, fits naturally to the contour of your face in order to block out airborne contaminants, lightweight and comfortable with a pivot headband that allows for optimal placement. Meets ANSI Z.87.1-2003. 12/bx. WARNING: IRUV products block red spectrum colors and are not to be used when color recognition, such as when driving, is essential.