The FULL DRY aspect of the SN-115 snorkel allows you to save energy and makes for a comfortable surface swim.
The full dry snorkel has a float valve mechanism at the top of the snorkel that closes when the snorkel is submerged and opens when on the surface - preventing water from entering into the snorkel. This includes when you accidentally submerge the snorkel or when the snorkel goes underwater while you are free-diving or scuba diving.
If some water does get into the snorkel tube, it is channeled out of the purge valve at the bottom of the tube so it does not interrupt the flow of breathing.
This snorkel allows you to conserve energy and swim more efficiently - without having to forcefully blow air out the tube or raise your head to clear out the snorkel - resulting in one long uninterrupted swim!
It also features an angled mouthpiece made from super soft silicone for extra comfort.