This chapter centres on interviews with feminist activists from Puerto Rico to understand how their participation in the street performance Musas Desprovistas y Sin Sostén (or dispossessed muses without support) reveals what I call an island feminist praxis. This concept identifies contemporary feminist activist strategies of resistance contesting dominant constructs of island, islanders, and heteropatriarchal gender paradigms. Praxis strategically serves to articulate the process in which activists engage in both theory and practice specifically to the context of islands, and particularly to the context of Puerto Rico. Drawing from a cross-disciplinary theoretical framework advanced by scholarship on island, feminist and Puerto Rican theories, I argue that activists’ modes of organising lead to a praxis characterised by knowledge production interconnecting island-living and feminist practices.