Used Mares Pure Instinct Snorkel DualDual Freediving Snorkel The Dual freediving snorkel is crafted using bi material with varying softness levels, ensuring optimal flexibility without any air flow disruptions. Its hydrodynamic anatomical profile minimizes vibrations and eliminates underwater noise during movement. The snorkel's hypoallergenic silicone mouthpiece makes it perfect for extended breath hold diving expeditions.