An extra pair of waterproof earplugs is included New GoPro diving mask, SJ4000 diving mask, fully dry snorkeling mask Polycarbonate shatterproof visor Lining material: Imported medical-grade liquid silicone. Exhaust fan design, effectively prevents fogging, no need for a breathing tube, DRYDOP system, the top valve automatically closes upon entering the water to prevent water from entering, elastic headband, easy to wear without snagging hair, ultra-wide shatterproof face shield Color: blue, green, rose red, black Packing quantity: 10 pieces Weight with packaging: 600g Product net weight: 576g Size: S/M size: inner diameter 17*13CM, outer diameter 23*19CM L/XL size: inner diameter 19*13CM, outer diameter 23*19CM Suitable for various models of GoPro cameras (GoPro Hero 1, 2, 3, 3+, 4...) and has been sold to many foreign countries, consistently receiving positive feedback from customers, with guaranteed quality Size purchase recommendation: If the length from the forehead to the chin is less than 15cm, it is recommended to buy size S/M. If it is more than 15cm, buy size L/XL