1. Water tight with ergonomic design, good for human face, no inhaled water
2. Ventilating fan design, anti-fog, breathe freely without chewing the breathing tube
3. When in water, the top valve auto closes to prevent water in flow
4. Dry diving technology stops water from getting into your mouth and prevents gagging
5. With a mount for mounting action camera
6. Design principle: Dual airflow anti-fog channel, dry top system, drainage valves, elastic fabric head strap, super wide vandal-proof mask
7. Note: The showing camera, waterproof case and screw are not included.