When it comes to grappling with both the environmental and social dimensions of energy transitions, sustainable wellbeing can be seen as a normative aim to be achieved through the satisfaction of human needs. This article exposes an engaging conceptual framework that describes the reduction of consumption through social practice theory, combined with a eudemonic approach to well-being. Drawing on individual interviews with people who declare themselves as ‘living degrowth’ in French speaking Switzerland, the paper discusses everyday practice of consumption reduction that inform the actualization of fundamental needs. The paper proposes an operationalization of Max-Neef’s approach of needs satisfaction, showing that an emphasis can be placed on sustainable practices representing synergic satisfiers. To support social change towards sufficiency, the paper discusses that synergic satisfiers must be planned for collectively. Synergic collective changes are discussed in relation to synergic configurations of practices towards consumption reduction and needs satisfaction – or sufficiency.