Dr. Scholl's Air-Pillo Original Insoles has a patented double layer system which includes a top layer of soft cushioning foam that provides long-lasting comfort and a bottom layer of shock absorbing foam that bounces back time after time. The top cloth contains an antimicrobial agent that kills odour-causing fungus and bacteria. The insole provides less wrinkling, bunching and slipping and has an excellent shoe fit. It contains natural rubber (latex).