Dual Press Buckle Adjustment: The oval diving mask headband adjusts easily with a dual press system, providing flexible fit and straightforward operation. Expansive Viewing Lens: Large view single lens offers an expansive field of vision, bringing underwater scenery closer and enhancing situational awareness. Widened Headband: The widened headband distributes pressure more evenly across the head, reducing tightness and improving comfort during extended use. Tempered Glass Lens: A 4 mm thick tempered glass lens delivers transparency and durability for clear vision in underwater conditions. Use scenarios Snorkeling around reefs and shallow coastal waters to enjoy a broad view with comfortable wear. Openwater scuba diving or spearfishing where a secure seal and wide lens improve balance and visibility. Underwater photography or exploration in calm to moderate conditions, benefiting from clear optics and reliable comfort. Key attributes Function: Adjustable dual buckle system, single expansive lens, widened headband, tempered glass lens. Material and lens: 4 mm tempered glass for durability and clarity. Fit and comfort: Widened headband for even pressure distribution. Performance: Large viewing area and easy adjustment support enhanced underwater experience.