Full-face snorkel mask thumb|Decathlon Easybreath snorkel mask An integrated snorkel consists essentially of a tube topped with a shut-off valve and opening at the bottom into the interior of a diving mask. Integrated snorkels must be fitted with valves to shut off the snorkel's air inlet when submerged. Water will otherwise pour into the opening at the top and flood the interior of the mask. Snorkels are attached to sockets on the top or the sides of the mask.
FuLl-Face snorkel Mask thumb|decatHLOn eaSybrEaTh SnorKeL mask an intEGRATed SnorkeL cOnsistS ESSenTially of a tuBe toppEd witH a SHut-Off valve anD opENing at The botTom IntO tHE iNterioR Of a DivinG mASk inTeGRated snorkels muST be fitted WiTh VAlVes to shut ofF the snorKel's air InlEt wHen submerged waTer wiLl Otherwise pour into The oPening At tHe TOp AnD fLood THe IntERioR oF the maSK Snorkels are attaChEd tO SocKets ON tHe tOP oR the sIdes of tHe MaSk