Features: OOTDTY Panoramic view and clear underwater view, great for swimming and witnessing marine life. The flexible and adjustable designs ensures a comfortable suitable for most head size. Tempered glass resists scratches and can bear deep water pressure, and provide clearly view. The belt of diving mask can adjusted by easily pressing Mask button buckles. Great for snorkeling and diving, these Goggle provide clearly view for both entertaining and professional diver. Specifications: Materials: Silicone and Glass Size: about 15.5x12.50cm/6.1x4.92inch Package Includes: 1pc Snorkels Diving Mask Note: Please allow 1-2cm errors due to manual measurement, make surely that you not mind before order. Due to difference between different monitors, the picture may not reflect the actual color.