EASILY ATTACH TO MASK: The tube clip could easily attach to any brands standard dive snorkel masks. Quick release adjustable clip easy to clip it on/off a diving mask, allowing movement up and down the snorkel tube, for a comfortable position. Long-lasting clip for easy install & remove.<br> FOOD-GRADE SILICONE MOUTHPIECE: Super soft and safe food grade silicone for the mouthpiece, very comfortable in your mouth and provides a good seal. It's removable and replaceable if necessary.<br> LONGER OVAL UPPER TUBE: A large diameter tube will give you full breaths without making you struggle to catch your breath. The upper tube is curved and comes close to your head, which will prevent drag your mouth.<br> EASY ONE WAY PURGE VALVE: Water can be cleared out of the dry snorkel tube effortlessly while under water, all you have to do is give it a good blow.<br> ADVANCED TOP DRY VALVE: dry snorkel use a lever paddle flip dry top, it automatically flips and closes the air entrance when submerged under water. Even waves crash overhead, the splash-guard will prevent water from coming into the snorkel. Unlike other float ball valve which gets lodged easily by small sand, our design paddle won't be stuck.