A maunch (from the French manche "sleeve") is a heraldic charge representing a detachable lady's sleeve with a wide pendulous cuff, as was fashionable amongst women in the 13th and 14th centuries. They are found most frequently in English heraldry, occurring to a lesser extent in the heraldry of France, Scotland, and other nations.
In Sir Thomas Malory's Le Morte d'Arthur, Sir Lancelot fights in a tournament anonymously as an unknown knight using a white shield with a red sleeve on it. He also affixes Lady Elaine le Blanc's sleeve to his helmet to further disguise himself as he has never worn a lady's token of affection in a tournament.