The Show X3 features the Flyfree Interchange Lens System, allowing for quick lens transitions between bright sunlight and low-light conditions. The design includes a flip, mount, and lock mechanism for efficient lens changes. max optics with anti-reflective coating interchangeable lens system 4-base flat lens silicone wrapped nose pad and temples extra set of interchangeable lenses injected frame material derived from castor bean oil optical clip-in for prescription lenses