This is the Sherwood Tiga 100% Dry Snorkel With Silicone Mouth Piece & Flex Tube Features: Special valve seals tube when submerged - keeps water out! Tube is contoured for hydrodynamica when swimming at the surface Corrugated Flex Tube & Mouthpiece is 100% liquid silicone for comfort Removable, replaceable mouthpiece Deep reservoir below the mouthpiece with one-way purge valve New quick-disconnect (QD) snorkel keeper for convenience The streamlined base provides a reservoir of space for air to flow freely from the tube to the mouthpiece without restriction. The oversize purge valve allows easy clearing of the snorkel. The 100% liquid silicone mouthpiece and flex tube ensure comfort in every situation. The Tiga also comes with a new Quick-Disconnect Snorkel Keeper to eliminate the effort of connecting to your mask for each dive.