The term SLEEVE CONTENT is composed of two words, ARM and CONTENT. ARM is a three-letter word that refers to the upper limb of the human body, extending from the shoulder to the hand. CONTENT is a five-letter word that refers to the ideas, facts, or images contained in something such as a book, film, or website. Together, the two words form the phrase SLEEVE CONTENT, which can refer to the material that is placed inside a sleeve, such as a record sleeve or a protective cover for a book.