A lappet is a ecorative flap or fold in a ceremonial headdress or garment. They were a feature of women's headgear until the early 20th century. They remain strongly associated with religion. A bishop's mitre has two lappets (infulæ) sewn to the back of it. The most famous usage of lappets occurs on the Papal Tiara. Lappets also feature on some animals.