“Sharper Image's new Contour-Foam™ Silver slippers feature insoles of viscoelastic foam that's infused with microscopic particles of silver — the antibacterial product of the latest nanotechnology. These ultra-fine silver nanoparticles cannot be seen or felt but they really enhance these slippers by killing or reducing the growth of odor-causing bacteria and of fungus that can irritate your skin. This "nanosilver" is a mineral that is safely used in many everyday products — such as adhesive "silver" bandages — because of its all-natural anti-mite, anti-mold and anti-microbe properties.”