In fencing, a lamé is an electrically conductive jacket worn by foil and sabre fencers in order to define the scoring area (which is different for each weapon). Foil lamés, although traditionally a metallic grey, are becoming more and more popular in an array of colors. In foil, the lamé extends on the torso from the shoulders to the groin area, including the back. In sabre, the lamé covers both arms, the torso from the shoulders to the waist, and the back. Lamés used in higher-level competitions usually have the last name and country of their owner printed in blue across the back. In addition, sabre fencers wear masks that allow them to register head touches, and manchettes, which are conductive glove covers, on their weapon hand. Lamés are wired by use of a body cord to a scoring machine, which allows the other person's weapon to register touches when their tips (or blades, in sabre) contact the lamé. Lamés are most commonly made of a polyester jacket, overlain with a thin, interwoven metal, usually steel or copper, which gives them a metallic grayish look.
The dictionary definition of lamé at Wiktionary