When inhaled, air enters directly from both sides and does not stay in field of vision. When exhaling, exhaust gases is discharged from exhaust valve in middle to prevents generations of fog. Equipped with lenses, users can enjoy underwater scenery more clearly. fog film design, can be to 15000 hours of fog effect, no fog obstruct line of sight. Waterproof system, floatings bead design, prevents seawater from entering breathing tube. 3D fit, tight waterproof, fit face.
