tattoo and frostbite are the two options i can think of off the top of my head. i know this question will be ignored, because it is every time, but what is the benefit of permanently filthy black soles?
Just Stop Worrying And Go About Your Everyday Business.......Your Soles Will Take Care Of Themselves....... Iv'e Been A Fulltime Barefooter For Nearly 10 Years And I Really Don't Care What Colour My Soles Are As Long As My Feet Are Happy And Healthy. Cheers Glen.