Material comprising a stack with thermal properties

The present invention relates to a material comprising a transparent substrate on the surface of which a stack of layers is deposited which itself comprises a plurality of functional layers making it possible to act on the solar and/or infrared ray likely to strike said surface. The material comprises a transparent substrate on at least one surface of which a stack of layers is deposited which comprises n silver-based metallic functional layers and n+1 dielectric assemblies of layers, n being equal to or greater than 3 and each silver-based metallic functional layer being arranged between two dielectric assemblies of layers. The material is characterized in that the dielectric assembly of layers located below the first silver-based metallic functional layer from the substrate and the dielectric assembly of layers located above the last silver-based metallic functional layer from the substrate, - each comprise a layer with a high refractive index, the value of said index being equal to or greater than 2.15 with a wavelength of 550 nm; -the value of the refractive index of at least one of the high index layers is equal to or greater than 2.40 with a wavelength of 550 nm; and - the value of the ratio of the optical thickness of each of said high refractive index layers to the optical thickness of the dielectric assembly of layers in which it is included is between 0.25 and 0.55. The invention also relates to glazing including such a material.