Many practical application require using materials with low reflectivity and high absorption coefficient. Such materials can be used for creation of lenses anti-reflective coatings, absorbers for IR and THz bolometers, night vision devices, solar concentrators etc. A great range of different complicated and expensive technologies are used in order to create such coatings. It was revealed that graphene and carbon nanotubes possess unique optical properties in visible and IR wavelength range. Single and multilayer graphene reveals high absorption values in a wide spectral range which originate from its unique dispersion law [1]. At the same time, an increase in the number of layers leads to a sharp rise of its reflection index [2]. It has been revealed that an array of vertically oriented carbon nanotubes shows a record high absorption efficiency in a wide wavelength range [3,4]. Bolometers, non-linear absorbers were implemented on the basis of such materials.    In this study we represent unique optical and thermal properties of Carbon NanoWalls (CNW). CNWs consist of few graphene layers located almost perpendicular to substrate and possess large specific surface area (Fig. 1). CNWs can be synthesized by different CVD methods. Herein CNWs were synthesized by DC PECVD method and optical properties in the range 0.4-200 mkm were measured (Fig. 1). Absorption value of more than 99.8% in the visible and more than 95% in the IR range were achieved [5,6]. These values are record high per unit of weight and thickness of the film.