180Panoramic ViewWith its optical mirror and high light transmission of the snorkelling mask full face, you could enjoy 180panoramic view to get an unobstructed clear view of the wonderful ocean of various fishes and other marine life. The diving mask also has a detachable sports camera slot on top so you can attach your sports camera to it and record the beautiful underwater world to share with your family and friends. Anti-fog & Anti-leakThis snorkel set adults uses the exhaust fan principle with dual airflow anti-fog channels for effective anti-fogging and eliminates the need for a mouth-bite breathing tube. The dry top system automatically closes the top valve to prevent water from entering if immersed in water. Also features a medical grade silicone pad and soft elastic webbing, soft and comfortable which fits closely to your face to prevent water from leaking in or choking.