I'm Hiring An Artist For A 3d Printed Mask.

Something similar to this https://www.geeky-gadgets.com/aire-mask-uses-your-breath-to-charge-your-ios-device-29-02-2012/

Not sure how to go about the strap. Maybe someone has a suggestion for that.

As far as the tech goes the mask needs to have decent airflow. It also needs a lot of extra room for the vertical turbine to fit which is 2 x 2 x 2.4 inches

Here is the turbine https://www.amazon.com/Vertical-Tur...-9-spons&keywords=vertical+mini+turbine&psc=1

I don't want to bother you,- but:

The "generator" power = 0,5 Watt?
That's 0,1 Ampere at 5,5 Volt

You would have to take a deep breath and have to climb the Mount Everest to charge your smartphone...
...But maybe it's just an experiment

Its a prototype.

In addition to the low power available from breathing, that does not look like an efficient turbine. It's a bit outside my expertise, but I'm pretty sure I could design a much better unit for the purpose.

Better eat bean soup,- and work with compressed air after...

have you done that?maybe we can work together,i am a mechanical engineer with more than 13 years' experience.
if possible,please send more information,e.g.a simple sketch with some dimensions.
you can contact me :tanerxun@gmail.com
thanks