Promate Ultra Dry Diving Snorkel with Signal Whistle/ SK890

A 100% submersible dry snorkel features upper valve and hinged seal keeps water from entering the snorkel as in submerge; but allows air to easily enter snorkel for clean and unobstructed breathing as on surface. Specially designed cover guards against water splashing into the snorkel. Slip-in snorkel keeper with quick release retainer. Flexible silicone corrugated low section bends easily. Colored whistle housing to get attention. Pre-curved silicone mouthpiece, prevents jaw fatigue. Silicone one way purge valve not only keep water out from snorkel but for easy draining.