The modern Maui Snorkeling / Diving mask is our lowest volume mask, making it the top choice for divers and snorkelers alike. The sleek and lightweight frame allows the mask to sit as close to your face as possible, giving you more peripheral vision and comfort while snorkeling. This mask is designed to fit a majority of customers with varying face shapes. The Maui Prescription Snorkeling / Diving mask offers a variety of stock lenses in half-diopters from -10 to +4.5. Not sure how to calculate your prescription values? Either upload your prescription or use our Optical Lens Calculator. These masks are ready to ship within one business day. Fill out my online form. Lenses for Life Program We realize your eyesight evolves over time, and the lenses you order today may not work in a year or two. As your prescription changes, we want to update your mask's lenses to match. We offer an industry unique lifetime lens replacement opportunity for all customers who purchase our prescription masks. Once you order a prescription mask from us, you qualify to get replacement lenses for life at 50% off the normal retail price of the lenses. Time for a replacement? Contact us today! Learn More Here! //