Over the whole body, sensors detect body temperature and signal to the brain if it is time to regulate it. This is done primarily through perspiration. However, there are two types of sweat – heat sweat and stress sweat.
Heat sweat, for example excreted during exercise come from squirrel glands and stress sweat from the apocrine glands. There is no big difference between the sweat secreted, but usually you can say that the apocrine glands (stress sweat) produce more proteinaceous sweat – something that bacteria and fungus like to eat. The reason that foot sweat is such a big problem is mostly because there are more bacteria and fungi in dark, humid environments – such as shoes.
When the bacteria are then saturated, they emit sulfur-like substances that, for us, smell fairly unpleasant. What SmellWell does is to remove just the moisture where bacteria and fungi thrive to eliminate the problem before it occurs.