SUPER VISION 180� FULL FACE DESIGN- makes it easier than ever to breathe comfortably through your mouth or nose while you are snorkeling. Our mask provides a 180� viewing area- the biggest of any snorkel mask on the market today guaranteeing that you will have a broader field of vision than ever before. ANTI-FOG DESIGN-Our innovative design features a separate breathing chamber that creates an airflow away from your main viewing visor,Breath gas directly discharge by the valve of the mouth,this new design totally eliminate fogging up,Never worry fog and just go-as-you-please enjoy the beauty underwater. DRY SNORKEL TECHNOLOGY Soft silicone material cling the face and stops salt water from getting into your mouth and eyes. Spend less time worrying about water in your mask and more time snorkeling!and the Ventilation pipe is longer,More easily getting air in the water. A Mount can be used to put a camera and a matching nut,Soft elastic bandage is suitable for various head shape, Please adjust the headband to fit your face well in case of leaking and fogging.SharkFYN