Ivation Diving Gear - Snorkel Mask & Fins Set &ndash; Includes Single Lens Frameless Lens Snorkel Mask; Snorkel w/Dry Top & Lower Purge Valve; & Adjustable Speed Fins Single-Lens Design Provides Wide Field of View 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