Chaps
Chaparreras or chaps are a type of sturdy over-pants (overalls) or leggings that developed in Mexico from earlier Spanish equestrian and ranching traditions brought to America during the colonial era. Chaps are made of leather, without a seat, made up of two separate legs that are fastened to the waist with straps or belt. They are worn over trousers and were originally intended for protecting the rider from the rain and mud, and from tears and injuries. They were created to replace armas de agua or simply armas (shields), a set of leather flaps that hung from the Mexican saddle to protect the rider's legs from the rain. The word "chaparreras" is believed to have come from either “chaparrón”, a cloudburst or sudden, heavy rain, or from “chaparros”, a Mexican colloquial name for brush and a type of shrub. Due to the difficult pronunciation, Americans shortened the word to Chaps, originally spelled and pronounced schaps or shaps. Chivarras, from chivo (goat), is the name for chaparreras made of goatskins tanned with the hair on.
Read on Wikipedia