A lappet is a decorative flap, fold or hanging part of a headdress or garment. Worn in a pair, or as a singular long strip giving a symmetrical drape, lappets formed a popular part of women's headwear until the early-twentieth century, and remain a feature of religious garments. Examples of lappets appear on the papal tiara and on the nemes headdress of the kings of ancient Egypt. The same term is also used for similar-looking anatomical features on some animals.