Replacement tube for the Riffe Stable Snorkel: A low profile, light weight snorkel with a flexible vinyl tube, giving divers 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 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. Give it a try, you will not be disappointed!