The Mares Samurai Spear Fishing Snorkels Shape and Diameter prevent any Air Turbulence inside the Breathing Tube. Its Anatomical Shape Improves Hydrodynamics. The Samurai"s Anatomical Mouthpiece is made from Hypoallergenic Silicone for Comfort in Prolong-Use. The Samurai"s Contoured Tube stays Close-to-the-Divers Head Reducing Drag and Improving Comfort. A Classic J -Style Snorkel that has been tried and true, the Simple Design makes this Snorkel almost Bullet Proof and Reliable compared too many of the newer Hi-Tech Snorkels on the market. No fancy valves on top or bottom, if you can blast clear a snorkel than this is what you want. This Black Snorkel comes with a Low Profile Hydrodynamic Snorkel Keeper and is covered by a 24 month limited warranty.