Ratchet action temples combined with non-slip rubber head grips create a customized fit for virtually any head size. Wraparound lens constructed of lightweight, scratch resistant polycarbonate delivers advance visual acuity and protection. Meets the ANSI Z87.1 standard for optical clarity and impact resistance. 12/bx. WARNING: IRUV products block red spectrum colors and are not to be used when color recognition, such as when driving, is essential.