Using spring hinges.
Use a lens with a UV cut specification (99.9%).
The lens is anti-fog and anti-scratch.
For cutting, weeding, woodworking, felling, polishing, etc.Lens color: clearJIS T 8147 standard productWith top canopy sideLens thickness: approx. 2mmWeight: 34gCountry of origin:Japanese materialLens : Polycarbonate (anti-fog processing, anti-scratch processing)Frame: Nylon