Clapper Type Waterproof Valve
-Intelligent Opening, Control Oxygen in and Out Of Interlligent Closure, Block Water Entry.

A Portable Card Buckle
-Can Connect Surface Mirror/ Swimming Goggles, Regardless Of Model.

Corrugated Stomach Tube
-Using High Quality Silica Gel Material Soft.
-Good Toughness, Bending Can Also Ensure smooth Breathing.

Curved Silicone Bite
-Food Grafe Silica Get Bite, non-toxic and Odorless.

One Way Drain Valve
-If Water Can be Drained From This.