Tempered glass lenses:The tempered glass lens of snorkel mask is treated with anti-fog technologywhich can effectively prevent it from fogging up and provide you with a vivid view underwater. At the same time impace-resistant tempered glass is good to withstand the deep water pressure.3D Silicone Nose Cover:Silicone soft nose mask can provide breathing for those who do not breathe freely underwater.It has a lot of space and doesnt need to worry about squeezing your nose.It is suitable for different face shapeswithout any pressure on the face.Foldable Snorkeling Dry Top:Snorkel dry top breathering tube is composed of a dry top snorkela breathing tubeand mouthpiece.The snorkel has a highly flexible silicone corrugated tube that reduces jaw fatigue.It features a float mechanism that closes instantly to prevent water from entering the snorkel whether accidentally or purposely submerged.Easy to Breathe Dry Snorkel:The Snorkel adopts the most stable dry float valve design and can be fixed on the snorkel mask by a buckle.When immersed in waterthe snorkel is sealed to prevent water from entering the breathing tubethe lower purge valve can quickly drain the water.