Central purge valve design This snorkel designed for device diving features a professionally center-mounted purge valve, allowing you to stay relaxed and focus on your breathing and underwater strokes, which can improve your swimming experience. Hygienic mouthpiece Made from high-quality materials, the mouthpiece is lightweight and comfortable for diving, swimming and snorkeling, and helps maintain hygiene during use. Dimensions: 14.1 cm x 43 cm (5.55 in x 16.93 in). Efficient one-way purge system The one-way purge system aids exhalation with minimal water resistance, expels water completely, and helps keep your airways clear for smooth breathing. Adjustable fit The front snorkel is suitable for both men and women and features an adjustable wide strap and ribbed grooves on the tube to ensure a consistently comfortable fit that stays in place while swimming. Key attributes - Function: center-mounted purge valve, hygienic mouthpiece, one-way purge system, adjustable fit - Compatibility: designed for swimming, snorkeling and diving training; suitable for men and women - Size: dimensions 14.1 cm x 43 cm (5.55 in x 16.93 in) - Material: high-quality materials (mouthpiece) - Performance: easy breathing, effective water expulsion, secure fit during activity Use scenarios - Pool lap training and breathing technique drills to improve efficiency and rhythm - Open-water snorkeling or reef exploration with reliable purge and comfortable mouthfeel - Diving or water sport practice where a secure fit and quick water removal support focus on technique and endurance