The Deep See Dolphin Snorkel Semi-Dry with Purge Valve has all the features of the Dolphin with the added benefit of a semi-dry top tube. The elliptical upper tube and corrugated flex section is more streamlined than conventional snorkels. The Deep See Dolphin Snorkel Semi-Dry with Purge Valve also has a hypo-allergenic mouthpiece for the best in comfort and durability. The large reservoir at the base keeps any residual water out of the breathing path.
tried it and it's good i guess...i wished that the clip is made easy to fasten to your goggles. it's a hard plastic