The Swim Snorkel III is an athlete-tested training snorkel that is the perfect aid for focusing on the position in water and stroke efficiency. Its unique design allows swimmers to breathe underwater, with the help of a one-way purge valve. This feature makes it an ideal snorkel for beginners as it makes breathing more comfortable. The snorkel is front-mounted, with an adjustable strap and practical clip for a secure fit. This allows for a more natural swimming position and the one size fits all feature means it can be used by swimmers of various head sizes. It is the perfect tool to improve your endurance and technique during training sessions. Composition: 55% Polyvinyl Chloride 30% Silicone 10% Polycarbonate 5% Thermoplastic Rubber