Ideal for prolonged use, this snorkels hypoallergenic silicon mouthpiece is simple to clear and offers easy breathing. Diameter and length is optimized to avoid any air turbulence. Its hydrodynamic and anatomic to eliminate discomfort in the area that comes in contact with the temple. Strategically designed softness levels work by decreasing vibrations and noise when moving about during use, which increases comfort without causing airflow interruptions. Two year limited warranty.