OUTAD Diving Dive Mask Tempered Glass Lenses for Safety Swim Adjustment Strap Features: Large frame high-definition diving mask, non-toxic, tasteless, waterproof, scratch-resistant. Nice field of view: Glass Lens no tint or artificial color hindering your aesthetic pleasure. 180 panoramic vision, fit perfectly and provided you with an super wide high-definition field of view. Comfortable: 100% silicone skirt for ultimate comfortand long-life, not easy to leak. It is environmentally friendly and harmless to the human body. Shatter proof: Tempered glass lens for safety. Effective: UV protection and anti-fog coating enhances your swimming experience. Easily adjustment strap, for different head sizes of different age groups.