The winter style dirndl has heavy, warm skirts and aprons made of thick cotton, linen, velvet or wool, and long sleeves. The colors are usually rich and dark. The summer style is lighter and more frivolous, has short sleeves, and is often made of lightweight cotton, silk or satin.
Accessories may include a long apron tied round the waist, a waistcoat or a wool shawl. For colder weather there are heavy dirndl coats in the same cut as the dresses, with a high neck and front buttons, thick mittens and wool hats.
The placement of the knot on the apron is sometimes an indicator of the woman's marital status. When this is so, a knot tied on the woman's left side indicates she is single, a knot tied on the right means she is married, engaged or otherwise "taken", and a knot tied in back means the woman is widowed.
The dirndl originated as a simplified form of folk costume; the uniform of Austrian servants in the 19th century (dirndlegewand means "maid's dress"). Simple forms were also worn commonly by working women in plain colours or a simple check. Originally, each village had its own style and crest. The Austrian upper classes adopted the dirndl as high fashion in the 1870s. Today, dirndls vary from simple styles to exquisitely crafted, very expensive models.
In Bavaria, the dirndl may often be seen on women working in tourism-related businesses, and sometimes waitresses in traditional-style restaurants or biergartens. It is also seen in these regions by women in the folk music business.
Popular designs are often much brightly colored, with more ornamentation and decorative trim, and much more revealing and provocative (e.g. having a short skirt and/or displaying significant cleavage). A true dirndl at the Oktoberfest is usually a good way of distinguishing between a native Bavarian, and non-native visitors or residents in Bavaria. The true dirndl will be softer in color (as traditional vegetable dyes were not able to make bright colors), less revealing, and less gaudy in style. (See photo below: "Women wearing dirndls".)