Swimming Snorkel for Adults & Kids with Purge Valve, Center-Mount Snorkel, Silicon Mouthpiece (Promotes Correct Swimming Technique) COMFORTABLE SILICONE MOUTHPIECE. This premium Swimming Snorkel is designed with a soft and flexible silicone mouthpiece for improved comfort and zero gum irritation (so that you can focus on your swimming and breathing technique without annoying irritation and gum pain). PURGE FEATURE. The one-way purge valve designed into this snorkel allows you to effortless clear water from the snorkel while swimming. Strategic positioning of the purge valve prevents air bubbles from affecting your vision when in use. CUSTOMIZABLE HEAD STRAP. The soft silicone head strap is designed to be quickly and easily adjusted to fit any head size by simply pulling on the strap (easily tighten or loosen the strap for ultimate comfort). This customizable head strap is designed to be used in conjunction with a ship cap or any swimming goggles. HYDRODYNAMIC CENTER-MOUNT DESIGN. The specially designed tube shape helps to reduce water resistance and improve vision while swimming. The snorkel tube ergonomically curves around the head to promote optimal streamlined body position when in use. The Center Mount Snorkel design allows any swimmer to relax in the water while improving technique and breathing without needing to turn the head to breath. GUARANTEE. This Swimming Snorkel with Silicone Mouthpiece and Purge Valve is backed up by a lifetime hassle-free guarantee. Just like our top-rated Snorkel Set, this swimming snorkel is made from premium materials, and we stand by every single product. If you have any issues, you are welcome to contact us for quick and easy support. Customers are our top priority and we will happily replace any defected products.