This faceshield is for chemical and splash applications, and is ideal for use in manufacturing plants, laboratories and other industrial applications that demand face protection against abrasive particles, splash and spray. It is manufactured with hand-polished molds for unsurpassed, distortion-free optical clarity and impact resistance. Nitrometer can only be used with V-Gard Standard (#56543) or Retractable (#56544) Chin Protector. Unit is compatible with V-Gard Headgear (#56530 - 56531 & 56533 - 56534). http://www.youtube.com/watch?v=2bLMvKbhpqA&feature=youtu.be Click here to learn more about the MSA V-Gard Faceshields.