A highly fluorinated nanostructured polymer foam with a density of at most 2.2 g/mL, wherein the density is measured on standard bodies with a diameter of 1 cm and a thickness of 3 mm and thereby the weight is determined by means of a high-precision scale, an absolute foam expansion of at least 1%, wherein the absolute foam expansion corresponds to the difference in density between the polymer foam and the unstructured or unfoamed bulk polymer which is free of cavities, as well as a free surface energy of at most 5 mN/m, wherein the free surface energy is measured using the OWRK method in accordance with DIN55660-2 by means of a commercial contact angle measurement device, wherein the fluorine content is at least 40 mol% with reference to the chemical composition of the polymer foam, wherein cavities with dimensions of at most 5 μm are homogeneously distributed throughout the entire volume of the polymer foam and the dimensions of the cavities are evaluated by means of scanning electron microscopy, and wherein the highly fluorinated nanostructured polymer foam is obtainable by a production method comprising the following steps: (a) curing a composition by supplying heat or light, optionally on a substrate to be coated, wherein the composition comprises: at least one monomer which can be polymerized by supplying heat or light, wherein the fluorine content of the at least one monomer is at least 40 mol%; a polymerization initiator which initiates the polymerization of the at least one monomer by supplying heat or light; and a non-polymerizable porogen; (b) optionally dipping the polymer foam obtained in this manner into a solvent; and (c) drying the polymer foam treated in this manner, wherein the steps (a) to (c) are optionally repeated at least once. wherein the fluorine content is at least 40 mol% with reference to the chemical composition of the polymer foam, wherein cavities with dimensions of at most 5 μm are homogeneously distributed throughout the entire volume of the polymer foam and the dimensions of the cavities are evaluated by means of scanning electron microscopy, and wherein the highly fluorinated nanostructured polymer foam is obtainable by a production method comprising the following steps: (a) curing a composition by supplying heat or light, optionally on a substrate to be coated, wherein the composition comprises: at least one monomer which can be polymerized by supplying heat or light, wherein the fluorine content of the at least one monomer is at least 40 mol%; a polymerization initiator which initiates the polymerization of the at least one monomer by supplying heat or light; and a non-polymerizable porogen; (b) optionally dipping the polymer foam obtained in this manner into a solvent; and (c) drying the polymer foam treated in this manner, wherein the steps (a) to (c) are optionally repeated at least once. (a) curing a composition by supplying heat or light, optionally on a substrate to be coated, wherein the composition comprises: at least one monomer which can be polymerized by supplying heat or light, wherein the fluorine content of the at least one monomer is at least 40 mol%; a polymerization initiator which initiates the polymerization of the at least one monomer by supplying heat or light; and a non-polymerizable porogen; at least one monomer which can be polymerized by supplying heat or light, wherein the fluorine content of the at least one monomer is at least 40 mol%; a polymerization initiator which initiates the polymerization of the at least one monomer by supplying heat or light; and a non-polymerizable porogen; (b) optionally dipping the polymer foam obtained in this manner into a solvent; and (c) drying the polymer foam treated in this manner, wherein the steps (a) to (c) are optionally repeated at least once. <EOS>