ADVANCED ANTI-FOG TECHNOLOGY: Our mask comes fully equipped with the most advanced anti-fog technology available. The inside lens has a replaceable, anti-fog thin film that protects against fogging for at least a year, depending on use & care. Our mask is equipped with a secure travel case and additional anti-fog spray. Our anti-fog film technology can be prolonged and restored when paired with our anti-fog spray. LEAK-FREE DESIGN: With a High-Quality Silicone Skirt, and a two-way adjustable head strap, the Single Lens Tidal Mask is designed to keep water out of your mask and eliminate any pressure points, especially on the bridge of your nose or brow. LOW-VOLUME: The single-lens, low-volume design maximizes your field of view, and allows you to comfortably dive to deeper depths without pressure on your face, while making it easier to equalize. Fits 90% of face sizes and shapes, and if it doesnt fit properly, no worries - we offer free returns WHAT'S INCLUDED: Tidal Mask with Advanced Anti-Fog Films pre-adhered, a protective layer covering Anti-Fog Films (remove before use), a hard shell mask box for safe storage and travel, Anti-Fog Spray to prolong and enhance Anti-Fog Films properties after hundreds of uses and also acts as a lens cleaner if you don't get the chance to clean your mask after use, instructions, and a care card so you can enjoy your Tidal Mask fog free for years.