1) Lightweight and bite friendly design: The small, light silicone suction nozzle is comfortable to bite and wear, helping to reduce jaw fatigue during extended use. Easy to wear and unobtrusive. 2) Silicone construction: Made from elastic, odorless silicone, it offers wear resistance and durability for a long service life. 3) Non-slip and leak-proof seal: Textured edge provides secure grip with anti-slip and anti-shedding properties. Strong sealing performance ensures no leakage during use. 4) Wide applicability: Commonly used for diving, vacations, training, swimming, and other water activities to enhance enjoyment of underwater and pool experiences. Use scenarios: - Scuba diving: comfortable bite and secure fit for long dives, maintaining performance and comfort. - Pool training: reduces jaw fatigue during repeated breathing and maintains a stable seal for practice. - Vacation snorkeling or casual swimming: lightweight, portable, and easy to use for recreational water activities.