Commonly used in medium to low light conditions. Enhanced contrast. Single lens design provides maximum protection from excessive glare. Provides 99% protection from harmful UV-A and UV-B rays. Durable dual injected polycarbonate and rubber temples. Ribbed cushioned nosepiece fits a wide range of bridge sizes and protects against slippage. Exceeds the ANSI Z87.1-2003 High Velocity Impact Standards.