Sofia Gray was founded in 2015 and primarily targeted the fetish scene, but it has now developed into one of the world’s biggest and safest underwear markets. Sofia Gray, an adult marketplace in the United States, with hundreds of registered vendors that sell old underwear and other personal goods. There has always been a sizable fetish market for worn underwear in Asia, but Sofia Gray was the first to cater to a Western audience by selling secondhand lingerie and used sex toys.