Unopened, brand new Silverlight Crew Socks, Medium (mens 6.5-8.5, womens 8-10). I accidentally ordered medium. These are too big for me. My loss, your gain. From the company: Our silver socks, are lined with silver threads made from pure silver. The same antimicrobial technologies used by astronauts and medical professionals to prevent bacteria build up and growth is in Silverlight hiking socks. Not only does bacteria cause the foot odor that’s starting to develop when you hike, but it also is a leading cause of foot-rot. With our antimicrobial socks we’re creating a bacteria-free zone around your feet for blister-free hiking bliss without the bad smell. Pet/smoke free home.