The wearing away of any part of material by rubbing it against another surface. The term is often used to describe the processes of creating an aged look in denim. Abrasion can be achieved through hand rubbing with sandpaper or even washing garments with stones or rubber balls to break down the surface of the fabric. Think of the abraded seams and hems on your favorite pair of old jeans. This is the distressed look (as opposed to worn-out) that is entirely intentional.