This is the Tilos Ari Dry Snorkel w/ Purge 100% Dry for Divers and Snorkelers Features: Designed to provide completely dry breathing for both divers and snorkelers Prompt clearing through bottom drain valve Quick release adjustable snorkel keeper Advanced quick release adjustable snorkel keeper Crystal silicone mouthpiece The Ari Dry Snorkel uses the latest dry snorkel technologies to provide the diver with an easy breathing and most importantly a dry experience.