The product is a 1978 paperback book titled "Masculinity & Femininity" by authors Janet Spence and Robert Helmreich. Published by the University of Texas Press, this book falls under the topic of Gender Studies. Written in English, this book explores the concepts of masculinity and femininity from a psychological perspective, delving into the societal expectations and stereotypes surrounding gender roles. A valuable addition to the literature on gender studies, this book offers insights into the complexities of gender identity and expression.