The black socks have non-slip ABS dots on the soles, so you can wear them for yoga or Pilates. The smooth socks have a high natural cotton content, making them soft to the touch and good at absorbing moisture. The toe socks are taller and are suitable not only for barefoot shoes but also for FiveFingers toe shoes. Thanks to their non-slip soles, you can wear toe socks instead of slippers at home.