Upgraded three-channel snorkel: The snorkel gets a and upgraded three-channel design, divided into a main drain valve and auxiliary drain valve. The flow of water is separated from the air. There is a worm-like valve at the top of the breathing tube to prevent water from entering during the dive. It also allows air to enter the tube, making it easier for you to breathe and giving you a safe and secure diving experience.Anti-fog and waterproof: The diving goggles of the snorkel set are made of hardened glass, which is friction and fog resistant and offers a clear field of vision. The edges of the mask are made of soft silicone that fits snugly against your face and is waterproof.High quality food grade silicone: The edge of the mask, nose and snorkel are made of soft, comfortable, safe and durable material. You can easily bite during the snorkeling and it adapts ly to your mouth to reduce leakage.Practicality: The snorkel set has an adjustable, serrated adjustment strap that can be adjusted to fit over your head. The mask is specially designed for children and adolescents so that it conforms to their face and prevents water from getting into their eyes. The mask can be attached to the snorkel with a clip, leaving your hands free for a fun and relaxing dive.Guarantee: Our snorkel set has been thoroughly tested and customer satisfaction is our top priority. If you find faulty products please contact us and we will provide you with a free replacement or a full refund.