Mongolian dress has changed little since the days of the empire, because it is supremely well-adapted to the conditions of life on the steppe and the daily activities of pastoral nomads. However, there have been some changes in styles which distinguish modern Mongolian dress from historic costume. The deel, or kaftan, is the Monglian traditional garment worn on workdays and special days. It is a long, loose gown cut in one piece with the sleeves; it has a high collar and widely overlaps at the front. The deel is girdled with a sash. Mongolian deels always close on the wearer's right and traditionally have five fastenings. Modern deels often have decoratively cut overflaps, small round necklines, and sometimes contain a Mandarin collar. Depictions of Mongols during the time of the empire, however, show deels with more open necklines, no collars, and very simply cut overflaps, similar to the deels still worn by lamas in modern Mongolia. In addition to the deel, men and women might wear loose trousers beneath, and women might wear underskirts. Skirts of the same style are still worn in part of Mongolia and China today; they have plain front and back panels with closely pleated side panels. Paintings of Mongols from Persian and Chinese sources depict men, and often women, wearing their hair in braids. The hair would be divided into two pigtails, each of which would be divided into three braids. The ends of the braids would then be looped up and bound to the top of the braid behind the ears. Men shaved the tops and sides of their heads, usually leaving only a short "forelock" in front and the long hair behind. The famous bogtag headdress worn by women seems to have been restricted to married women of very high rank. Each ethnic group living in Mongolia has its own deel design distinguished by cut, color, and trimming. Before the revolution, all social strata in Mongolia had their own manner of dressing. Livestock breeders, for example, wore plain deels, which served them both summer and winter. The priests wore yellow deels with a cape or khimj thrown over it. Secular feudal lords put on smart hats and silk waistcoats. Mongolian man wearing traditional dress and holding a headless Marmot.. Mongolia, 2015.