In the following part the mechanical properties of state-ofthe-art tough hydrogels are discussed in more detail. The tough hydrogels are classified and discussed according to their modes of energy dissipation, which have been previously defined (Figure ): electrostatic interactions, microphase separation, composites and self-assembly. On account of the rich amount of reported materials, in selected cases, the subcategories are discussed separately (e.g., metal-ligand interactions, ionic interactions, etc.). Additionally, we highlight the water content of the presented data on tough hydrogels, as it substantially impacts the (fracture) mechanical properties.