The study explores the perspectives of participants in the Young Men Initiative (YMI), an innovative programme that aimed to promote healthier masculinities among boys attending vocational high schools in several Balkan countries through educational workshops, residential retreats and a social marketing campaign. Findings from four schools (in Belgrade, Sarajevo, Prishtina and Zagreb) suggest that several elements of the programme resonated strongly with participants and supported their meaningful engagement in project activities. Five themes emerged as most salient in identifying how and why specific aspects of YMI positively influenced participants: personal reflection, experience-based learning, connections with youth facilitators, new peer groups and aspirational messaging. Building on these insights, the study highlights potentially useful strategies for other programmes seeking to reach boys and transform their understanding of masculinity.