Interesting. I’ve never heard the term before, so I looked it up. Apparently, silver ion technology has been used in clothes dryers. The information below doesn’t sound very good, especially if it is a product applied directly to the body:
In 2007, the EPA announced that the silver ion technology should be classified as a pesticide since Samsung claimed that it kills 99.9 percent of odor-causing bacteria in the clothing. The matter is still being investigated, and it is not known what affect the silver ions may have on humans or on the environment in which they are drained. However, the EPA has allowed silver ion washers to still be sold, for now. Source