Color: black or blue. Size: L/XL or S/M. • Dry snorkel technology • GoPro camera holder (GoPro camera not included) • Double vents • Drain valve • Elastic nylon straps • Unbreakable polycarbonate glass with 180 ° wide viewfinder • Breath - natural air breathed in by the nose. Exhalation - natural nose breathing PRODUCT INFORMATION • Breathing tube - removable, easily portable • Wide vision - polycarbonate surface, wide-angle 3D arc • Dual Fog Airflow - Fan Effect • Large drain valve - raise your head to drain • Waterproof - stop-water system, smooth breathing • Easy to wear and take off - adjustable elastic strap • Comfortable to wear - liquid silicone edging meets environmental protection requirements. • 180-degree ultra wide vision, no blind spots, durable • Climb to drain the water through the valve at the bottom of the underwater mask. TECHNICAL DETAILS • 180 ° arc with a wide field of view - arcuate polycarbonate surface, giving a wider vision without blind spots, so that snorkelers can fully enjoy the underwater world. • Physical anti-fog principle - fan design, effective physical protection from fogging, lack of breathing tube, getting rid of discomfort, more hygienic. • Achieve a physical anti-fog effect by changing the direction of exhalation and inhalation. Inhale - inhale naturally. Exhale - exhale naturally. • Completely dry breathing tube - quickly stops the water, a large filter and a fine filter perfectly cope with this. HOW TO CHOOSE MASK SIZE First, measure the length from the eyes to the chin. If the length is less than 13.5 cm, select S / M size (suitable for teenagers and adult women). If the length is equal to or greater than 13.5 cm, choose size L / XL (suitable for adult men).