K3 Summer Snorkeling Mask Diving Mask Snorkel Mask with Dual Free Breathing System for Adults Black Bracelets Hat circumference: 58-60cm

Hat circumference: 58-60cm

The water proof glass is IP65

Varied Installation: Free Stranding includes Vertical or Horizontal installation

Easy to clean and use

K3 Summer Snorkeling Mask Diving Mask Snorkel Mask with Dual Free Breathing System for Adults Black Bracelets Hat circumference: 58-60cmDescription: The K3 snorkeling mask is crafted with a patented respiratory system that separates the inhaled air from the exhaled air, without carbon dioxide accumulation in the snorkeling mask. The fresh air enters through the double breathing tube and the air breathed out by the snorkeling diver is exhaled through a one way valve at the mouth. This mechanism ensures that the oxygen concentration in the snorkeling mask is basically the same as that