Lederhosen (. [leːdə.hoːzən] ; German for leather breeches; singular in German usage: Lederhose) are breeches made of leather; they may be either short or knee-length.ven today, some German and French Boy Scouts wear various forms of lederhosen, although in most cases they are not part of their official uniform. Lederhosen were also worn by Austrian boys from the 1930s to the 1970s. Today they are worn on special occasions, such as a Biergarten or Zeltfest.