• 1. Durability for repurposing aircraft materials: Uses ABS resin that is also used for aircraft parts. Combines shock absorption, insulation and dust resistance, protecting the lens from sudden temperature changes and drops when shooting outdoors • 2. (Perfect Fit Design) The body cover and back lens cover are compatible with Canon EF/ EFS/ 5DII/ 5DIII/ 6D. Precision reproduces the shape of the lens mount for various models. The precision of the processing in 0.004 inch (0.1 mm) increments to prevent optical axis slippage without compromising the image quality • 3. [3-layer protection system] The triple layer structure of the surface hardening coating (anti-scratch), anti-static treatment (dustproof), and water-repellent nano layer (waterproof), making it perfect for shooting in bad weather • 4. One-touch Detach Mechanism: Adopts a unique mechanism with a rotary lock. The double safety design allows you to install it in 3 seconds without the need for any tools, but will not slide off due to vibration or shock • 5. Pocket in Size: The thin design is equivalent to a lens cap. It can be stored in the gap between the camera bag, making it convenient for you to carry it when shooting outdoors