This is the Riffe Stable Semi-Dry Top Snorkel Low Profile Foldable Stowable Snorkel Features: A low profile light weight snorkel with a flexible vinyl tube, giving divers the ability to fold up or stow in their BC. The dry top is shaped like a shark fin and reduces catch of line, seaweed and floating material. The Stable is the easiest clearing snorkel tested in the industry. This amazing snorkel comes with a top quality hinged snorkel keeper and has been tested by divers as a true fresh air snorkel for freedivers. The RIFFE Stable snorkel comes with a high quality hinged snorkel keeper. It is the easiest clearing snorkel tested in our industry by freedivers. This Amazing snorkel is a true Fresh Air Snorkel.