If you're looking for an Oktoberfest costume or traditional Bavarian Tracht for men, this guide is for you. Here is a top down report on what to wear to Oktoberfest for men.
Oktoberfest hats look sharp and usually have braided string and a feather.
Men typically wear a checkered pattern collared shirt under their lederhosen, which can be short or long sleeved.
Lederhosen are typically made of leather, whether that be deer or cow leather. Lederhosen come in different lengths, typically either a bit above the knee or a bit below the knee. The Oktoberfest Lederhosen have leather suspenders that cross in the back and hold up your leather pants in front.
While a belt isn't necessary, some choose to wear a belt with lederhosen to add style.
A variety of mens Oktoberfest styles can be seen in this video: