Skull cap with ponytail holder/ hair wrap.
Yes, isn't this a 'biker' item?
The terms are interchangeable nowadays (doo rag/skull cap) but in this country a "doo rag" was traditionally worn by African Americans.I think I found it - Doo Rag - https://www.google.com/search?q=doo...ved=0CAcQ_AUoAmoVChMIh7rl2tDWyAIVw3A-Ch3aLg3e