Product description New Breathing System Featuring a brand-new breathing system that allows natural breathing while underwater. Oxygen enters through the dual floating ball into the whole inlet channel past the detachable snorkel. Carbon Dioxide is then emitted through two separate one-way outlet valves. 180° Panoramic View The 180° panoramic lens provides a wide-angle view to freely explore the vast underwater wonders without limitation. The slanted lens enables a clear field of vision. Comfort Technology The flat, high transmittance PC lens provides an anti-leak and anti-dizziness effect as you submerge underwater. The dual-outlet channel design circulates air through the mask to prevent fog build up. Comfortably explore the vast ocean. Removable Camera Mount Equipped with a removable camera mount for underwater photography and video. Compatible with standard waterproof sport cameras. High Quality Construction Your safety is the top priority. Made using high-quality Silicone, PC, and ABS plastic. One-year guaranty against manufacturer defects. TÜV Rheinland certified. CE EN 16805:2015 & 1972:2015. Secure Sizing Available in 3 different sizes with adjustable elastic straps for a safe and snug fit. Measure from the bottom of the chin to the top of the nasal bridge: XS: less than 3.95” (10cm) S/M: 3.95” (10cm) to 4.7” (12cm) L/XL: 4.7” (12cm) & above New Breathing System The new breathing system in the Nautilus full face mask circulates air throughout the mask which provides an anti-fog lens. Oxygen enters through the dual floating ball into the whole inlet channel past the detachable snorkel and out through the one-way outlet valves. You'll be able to focus on the sights to see while remaining comfortable with natural nose and mouth breathing. Full Face Mask Design Say