Quick Adjustment Buckle Adjust the buckle to adjust the size, suitable for different facial and head shapes. Can be used together with family members. The double-layer silicone skirt fits the face to prevent water leakage. Will not cause compression on the opposite side. ANTI-GLARE ANTI-FOG&LEAK: The glass of the swim goggles has undergone special anti fog treatment, allowing you to enjoy a crystal clear underwater experience. The soft seal skirt adopts a double-layer waterproof design to avoid leakage. Flat lenses to prevent dizziness ROBUST AND DURABLE GLASS: The goggles is made of impact-resistant tempered glass, which can withstand the impact of sharp objects and deep water pressure. Safe and secure with enhanced durability MAKE COMFORT SELF-CONTROLLABLE: The snorkel mask has an adjustable and serrated adjustment strap that can be adjusted to fit over your head and to fit different face shapes. You can adjust the goggles to fit you best, so they can be shared with your family too SAFE AND HIGH QUALITY MATERIAL: Our mask skirt, mask headband and nosepiece are made of food grade silicone, large skirt reduces the binding around the eye sockets, comfortable, well sealed, with plenty of space for the nosepiece, which can well protect your face EXCELLENT CUSTOMER SERVICE: From the date of your purchase of WSTOO snorkeling gear for adults, if the product fails, it can be replaced for within 90 days! If you have any complaints, please feel free to contact us, we will provide you with a worry-free shopping experience and satisfactory after-sales service. Concerns you may have, ensuring your satisfaction and support › See more product details