The socks are not only safe to wear but also do not harm the environment. You may have heard, or read, about concerns that that washing clothing made with silver nano-particles, releases silver-ions into your body, or the water, and could find their way into the natural environment, endangering aquatic and wildlife.
IM Fresh SilverSole socks are not infused with said silver-nanoparticles, which these days is strictly prohibited under European regulation, due to the risks mentioned. Instead we use silver yarn made in Italy manufactured under European regulations