This toolkit, developed by Promundo in collaboration with UNFPA and MenEngage, presents conceptual and practical information on engaging men and boys in promoting gender equality and health. Specific topics covered include: sexual and reproductive health (SRH), maternal, newborn, and child health (MNCH), fatherhood, HIV and AIDS prevention, care and support, and gender-based violence (GBV) prevention. The toolkit is designed for programme planners, health providers, peer educators, advocates, and others who work on issues related to the topics covered. Although chapters can be read individually, the authors recommend that the user first go over the introuction thoroughly as it provides an overview of the Gender Transformative Programming discussed throughout the toolkit.