IST Kids ProEar Pressure Equalization Mask with Watertight Ear Cups Underwater Camera Accessories 2400 percussions per minute) and

2400 percussions per minute) and app-controlled customizable speed range (any speed between 1750-2400 percussions per minute)

FluidFlex   Firewall

A soft silicone skirt conforms comfortably to the face and helps create a reliable seal

The 100% liquid silicone mouthpiece and flex tube ensure comfort in every situation

the Superzip uses our patented

IST Kids ProEar Pressure Equalization Mask with Watertight Ear Cups Underwater Camera Accessories 2400 percussions per minute) andSpecial tube and seal system automatically equalizes ear pressure as diver exhales into mask; Prevents pressure induced earache (barotrauma); Enhanced underwater hearing and sense of direction; Watertight ear cups keep water out to keep ears warm and prevent infection; A great mask choice for kids who are prone to earaches and ear infections