1.MATERIAL IN PROFESSIONAL QUALITY: It is shockproof and explosionproof, which makes it durable, robust and r. Not even the hardest hit with the sharpest or heaviest object can break or damage the lens of this mask. It is also designed to withstand the pressure of large amounts of water. 2.Leakproof: Snorkeling mask. The inner material of this snorkeling mask is highquality, environmentally friendly and , adheres firmly to the face and effectively prevents leakage. 3.Easy breathing and Antifog: The structure with separate inhalation and exhalation channels prevents air mixing and fogging problems, enjoy easy breathing like on land. 4.EASY TO USE AND FITS MOST: The mask has an adjustable strap that is easy to use, fits many face types, and is lightweight and ideal for diving.