• Dry snorkeling technology • GoPro camera holder (GoPro camera not included) • Double ventilation ducts • Drain valve • Elastic nylon straps • Durable PC glass with 180 ° visibility • Inhalation - natural air inhaled through the nose. Exhalation - natural nasal breathing. PRODUCT INFORMATION • Breathing tube - removable, easy to carry • Wide vision - polycarbonate surface with 3D wide visibility • Double anti-fog duct for air flow - fan effect • Large drain valve - raise your head to empty • Water tightness - water stopping system • Easy to put on and take off - adjustable elastic straps • Comfortable to wear - soft silicone edge meets environmental protection requirements • 180 degree extra wide visibility without blind spots, durable • Raise your head to drain the water through the valve from the bottom of the diving mask TECHNICAL DETAILS • 180 ° wide sight - arc-shaped polycarbonate surface, wider visibility without blind spots for snorkelers to enjoy the underwater world. • Anti-fogging principle - fan type construction, effective protection against fogging, absence of a tube, getting rid of discomfort, more hygienic. HOW TO CHOOSE A MASK SIZE: First, measure the length from the eyes to the chin. If the length is less than 13.5 cm, select the S / M size (suitable for teenagers and adult women). If the length is equal to or larger than 13.5 cm, select size L / XL (suitable for adult men).