Ivation Adult Diving Gear - Snorkel Mask & Fins Set, Double Lens Mask; Snorkel w/Dry Top & Adjustable Speed Fin Double-Lens Mask Offers Superior Facial Proximity for Underwater Exploration Tempered Glass Lenses Resist Scratching & Withstand Deep-Water Pressures Premium Snorkel Features Flexible Silicone Mouthpiece for Comfort & Durability Full Dry Top Prevents Salt Water from Entering Snorkel  Even When Submerged Speed-Focused Fins Feature Long Sole Plate for Added Thrust & Foot Strain Relief