What is the traditional men's outfit worn at Oktoberfest?

The traditional men’s outfit worn at Oktoberfest is lederhosen.

Lederhosen are leather breeches associated especially with Bavaria and the Alpine regions of southern Germany and Austria. The German word literally means “leather trousers.” Traditional examples may be short and end above the knee, or longer as knee-breeches known as Bundhosen. They are often worn with suspenders, a shirt, wool socks and sturdy shoes.

The garment probably developed from practical work clothing during the late Middle Ages. Leather was durable for hunters, farm workers and people engaged in outdoor labor. In the 19th century, cultural movements and costume-preservation associations helped promote lederhosen as symbols of regional identity rather than everyday workwear.

At Oktoberfest, lederhosen are the customary masculine counterpart to the dirndl, although wearing traditional dress is not a requirement for attending. Kniebundhosen and Bundhosen describe particular cuts or related forms, but “lederhosen” is the broad, familiar name a fair quizmaster expects. Jeans are modern casual clothing, not traditional Bavarian festival attire.