Fishtown Diving Snorkels &ndash; 17.5 inch Dual Valve Easy Breathe Snorkel, Reduces Water Intake, Mouthpiece Swivels for Optimum Comfort, Ideal for Water Sports, Promotes Proper Body Position and Technique DUAL VALVE MOUTHPIECE - Made of non-toxic, eco-friendly silicone, the corrugated mouthpiece is an essential piece of snorkel gear. Swivels for maximum comfort and control when swimming or executing flip turns. TOP VALVE - Seals tube to reduce water intake and eliminate leaks while swimming underwater. Clear and easy breathing snorkel gear for adults eliminates the need to turn the head to breathe so you can focus on and improve swim strokes, flip turns and more. PVC SNORKEL TUBE - Our hydrodynamic tube design creates the best swimming snorkel to promote proper body alignment and enhance stability when swimming. Sturdy yet lightweight it lets you glide through the water, dive and snorkel among coral reefs without hindrance or excessive drag. ADJUSTABLE SLIDING BUCKLE - Provides quick release from goggles or mask. Versatile underwater snorkel is ideal for snorkeling, water diving, scuba diving and free diving. MONEY BACK GUARANTEE - If you are unsatisfied with your Fishtown Diving Snorkel for any reason please send them back for a full refund!!