el forro - cover of a book, lining of clothing, upholsterySpanish example: Nunca use guantes que tienen un forro o muñequera de tela.
English example: Never use gloves that have a liner or a fabric wristband.
Source: el forro - cover of a book, lining of clothing, upholstery (https://www.123teachme.com/spanish_feeds/word_of_the_day/2021/5/1)