Full Face Double Tubes Snorkeling Mask.1. 180Panoramic View: The Panoramic Full Face Snorkel Mask provides you clear and superior view with HD quality optics,you can see the underwater viewing clearly.2.Latest Split Respiratory System: This snorkeling mask use unidirectional (External Circulation) respiratory separation to mechanically separate the expiratory and inspiratory breathing.The double breathing tube supply you enough air and the exhaled CO? is completely expelled from the front of the mask to prevent chest tightness and breathing difficulties.3. High-Quality Material: Made of high-quality PC and medical grade liquid silicone,odourless,safe and non-toxic to avoid facial incomfortable,3D fit for your face;The adjustable elastic straps make you wear the snorkel mask more convenient.Note:Please choose the correct size full face snorkel mask according to your facial size.4. Breath More Smoothly: Snorkel Mask adopts two breathing tubes, compared with the single tube snorkel mask,our double vent full face snorkel mask is more smooth to breathe. Feeding fresh air circulation by the mouth and nose togethermakes you more relaxed while snorkeling. The new breathing mode avoids blockage of a single breathing tube and doesn't worry about leaks or choking water.5.Double-Tube Free Breathing: It always strives to provide everyone who loves snorkeling with excellent products,our innovated scuba mask will provide adults and kids better snorkel experience.Please try it in a swimming pool and make sure it fits and seals.If you have any question,feel free to let us know,we will solve it as soon as possible.