Most Offensive Odour of Shoes & Feet Comes From Bacteria Such as Staphylococcus Aureus Which May Because of Food Poisoning as Well. They Eat Organic Material From Sweat & Dead Skin in Process of Proliferating, & Excrete Gas Which is Offensive Odour. Pedic Kills These Bacteria So That Nothing Can Generate Gas Any More. It is Important to Use Pedic Every Day to Keep Your Shoes Sanitized. We See an Opportunity for Brand to be Seen Over & Over Again. Minimum Quantity: 1.