Duster cap (börk) Cap material: outside: purple silk velvet, inside: Lining, red woollen cloth, napped; intermediate layer: invisible, brown felt. Decoration material: silk, silver thread with silk core in yellow; woven border of black and brown cotton. Metal braid, machine-made. The embroidery on the cap is the finest tambour work with silver threads and violet, black, green, pink and light violet silk. Metal braids have been sewn onto the seams and between the fields. Circles of white and black woollen cloth were attached to the top of the cap in 9 layers. The base braid of the tassel made of green and purple silk is sewn into the hollow of the circles. Verses from the Koran and invocations to God are embroidered into the large text fields.