From the data presented throughout this last section, it becomes apparent that double networks represent potent scaffolds to increase fracture energies. Single networks with metal coordination have been reported with higher stiffnesses, however, in most cases their fracture energies are lower. Dual cross-linking in a single network might be a strategy to alleviate this setback as seen by the last example, where metal coordination is complemented with few covalent cross-links in the same network.