Chaps or chaparajos are manufactured leather and are worn to cover your pants. They have no material at the pelvis and hips.
Chaparajos function to add protection mainly to the legs, by encasing them in leather while anchored with a leather belt at the waist.
They were first used by cowboys and rodeo participants, but now are a favorite with motorcyclists. Cowboys started wearing chaps to protect their legs and clothing from scratches from thorns, while herding. Nowadays, chaps are highly recommended for any rider looking for extra leg protection.