The soft silicone skirt of the scuba mask can perfectly fit various face shapes to form a completely watertight seal. The Snorkel uses the most stable dry float valve design and can be attached to the snorkel mask by a buckle. When immersed in water, the snorkel will seal to prevent water from entering the breathing tube. The lower purge valve can quickly drain the water, which is a great safety feature. The silicone mouthpiece is ergonomically designed, comfortable and durable. When diving and snorkeling underwater, you can enjoy relaxing and free breathing. Features: Purge Valve Brand: Aomais Color: Black Manufacturer: Engage