Best Shoe Inserts for Heels & Flats

How do rebounding PORON foam ball of foot inserts work?

How contoured PORON shoe inserts work "like mag...

When a customer wrote in an Amazon review that the ball of foot inserts I sold were "like magic" I was inspired to write a scientific explanation about the impact...

How contoured PORON shoe inserts work "like mag...

When a customer wrote in an Amazon review that the ball of foot inserts I sold were "like magic" I was inspired to write a scientific explanation about the impact...