Apollo 15 was the fourth manned lunar landing mission. The three-man crew was made up of David R. Scott (1932-), Alfred J. Worden (1932-), and James B. Irwin (1930-1991). The E.I. du Pont de Nemours & Company is a chemical company more commonly referred to as the DuPont company. DuPont materials were used in whole or in part for twenty of the twenty-one layers of the Apollo spacesuits. This is a NASA photograph of James Irwin on moon, August 1, 1971. Attached are strips naming the twenty-one different layers of his space suit.

The Martin L. Levene papers include reports, proposals, publications, and notes documenting his research work. Of particular note is the material relating to the Lunar Communications Relay Unit (LCRU) optical sight first used in the Apollo 15 mission. When Levene donated the collection in 2003, he added annotations and other contextual information to many of the documents.