National Geographic Explorer Swordfish Semi Dry Top Snorkel National Geographic Snorkeler "Explorer" Series Silicone mouthpiece for comfort with Purge "Pinch & Lock Snorkel Tab; Easy to mount and Secure Wide Breathing tube for easy air displacement / Semi - Dry Splash Guard National Geographic Snorkeler products are guaranteed against manufacturers defects. With proper care and storage of your snorkeling equipment you will be able to enjoy your snorkeling equipment for a very long time.