"a bright green chapan "

Hamid Karzai wearing a Chapan
Public DomainHamid Karzai wearing a Chapan - Credit: USAID
A chapan is a buttonless coat worn over other clothes.  It may be quilted or lined with fur, and tied with a cummerbund.  The sleeves are long, often reaching to the knees.  Chapans originated in the Turkic population, but are worn throughout Afganistan and surrounding Central Asian countries.