1. The material of frame is TPU
2. The material of lens is PC, 2.8mm thick; Anti-fog, anti-scrap, anti-high impact
3. Specially designed three tiered anti-fog system ensures clear, fog-free vision
4. Low profile design ensures compatibility with helmet, weapon sights, binoculars and night- vision systems
5. There are another two PCS lenses for customers
6. The colors of frame and lens are optional
7. With the reasonable price and long-standing quality