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

The latter has a new design with a very wide support area at the back of the neck for magnificent comfort

The raked lenses(Cressi patent)

Line Cutter: No

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