What is "aparejo"

Aparejo \A`pa*re"jo\, n. [Sp.] A kind of pack saddle used in the American military service and among the Spanish Americans. It is made of leather stuffed with hay, moss, or the like. [1913 Webster] ||

n. A kind of packsaddle formerly used in the American military and among the Spanish Americans, made of leather stuffed with hay, moss, or the like.