The Association of Cities and Regions for sustainable Resource management (ACR+) is an international network of cities and regions sharing the aim of promoting a sustainable resource management and accelerating the transition towards a circular economy on their territories and beyond. Circular economy calling for cooperation between all actors, ACR+ is open to other key players in the field of material resource management such as NGOS, academic institutions, consultancy or private organisations. The activities of the network are determined by its members’ needs and priorities. The key activities include facilitating the exchange of experiences between members, sharing technical and policy information and livening up the network. To strengthen the knowledge and capacities of the network and push forward innovation in the field of material resource management, ACR+ is also involved in several projects at European level and in the Mediterranean region, in cooperation with its members.