Piezo-Boots keep my toes warm please

Sure they are cute, my kid's shoes light up with tiny battery  powered lights.  Maybe piezoelectric would be better than batteries?

https://en.wikipedia.org/wiki/Piezoelectricity
So why are my toes getting cold in winter? There are only so may socks I can put on.  And since I am stomping around walking, why not have my boots pizo powered warmers. I don't need the lights, I need to keep my toes warm.

If you can do this Instructables to keep your phone charged...
https://www.instructables.com/id/Piezoelectric-Shoes-Charge-Your-Mobile-Device-by-W/

Goofy right?
DARPA doesn't think so.
https://abcnews.go.com/Technology/CuttingEdge/story?id=98238&page=1

What do you say Canadian Tire or Bata Shoes? Make me some pizo boot warmers!

Sensor Technology Inc
https://sensortechcanada.com/products/piezoelectric-ceramics/

Ridha Ben Mrad, PhD, P.Eng., FCSME, Professor, Mechanical Engineering, UofT
https://www.mie.utoronto.ca/mie/faculty/benmrad


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