The Switch Goggle System is revolutionary in its design and performance. The patent pending 1.4 turn snap lock system is fast and secure, making lens changing simple. The outer frame holds the lens in place with no extruding edge or protruding tabs; just clean looking style. The inner frame structure provides a secure platform for the lens and frame to compress together, giving stability under the most severe of impacts. The split frame and lens is secured in place by right and left locking tabs. Once assembled, the split frame system holds your lens securely into place while providing comfort and style. The patent pending locking tabs allow you to change lenses in seconds. The multi-ported earpiece allows unrestricted audible transfer to take place without sacrificing any ear protection and provides total comfort with two-layer foam. Sleek adjustable shade visor comes standard. Now comes with a Thermal lens for maximum anti-fog performance.