This is what happens when you take Hydrogen Peroxide (3% Local Drug Store Grade) and pour it onto a sole of a shoe, the reaction is from the Hydrogen Peroxide killing the buildup of bacteria. Hydrogen Peroxide can help kill odors, cuts, and also help whiten the teeth if used properly.
Heres an excellent example of a stronger reaction. I wore these shoes for a whole day without socks. It was my last week at school and I refused to do laundry. The reaction is stronger since the bacteria had a longer time to live and grow.
