The company dedicates a separate section to the more unique materials and finishes, the result of an aesthetic research that aims to mix different tastes and styles within the Frag world. Among these, the concrete effect refers to an industrial and brutalist architectural style of the 50s and 70s. In the catalog of the brand, the use of this surface is sometimes matched by affinity, with the rigor of metal and other times, by contrast, with the warmth of leather, and wood.