The design of hole is one-way inflatable to prevent air leak,if you want to vent the air, please hold the stomata. you can use pump(for bonus to every package) to gasing expand or by your mouth. Please purchase from Topso to make sure the quality and extra bonus.
There are three separate inflatable airbags with air holes,in case one of then leakage,other two airbags could be still normal use, it is safe design and suitable for 3-6 years old children, the ...
