A patented snorkel retainer that allows quick ratchet adjustment and quick disconnectnLarge, silicone purge valve for easy clearing of residual waternSmooth-Bore, silicone flex tubenSoft, comfortable silicone mouthpiecenSnorkels can be a drag on your dive-literally-but you don't want to be without one. That'S why we streamlined our snorkels to reduce drag. Color coordinate them with one of our great masks? absolute: absolutely dry the specialized dry top guards against splashes and seals the tube underwater, making this the dry snorkel that's truly dry! other features include: a patented snorkel retainer that allows quick ratchet adjustment and quick disconnect. Large, silicone purge valve for easy clearing of residual water. Smooth-Bore, silicone flex tube. Soft, comfortable silicone mouthpiece.