Flow chart of the process followed to build the composite IR SED for the Hiz-SFGs sample. The various phases of this process are shown on the right side of the figures. They are also described in more detail in the text (see Sect. 3) In the first phase, we selected only ALMA-detected objects to build the first IR template (IRV1). Next, we added the data from the z ∼ 4.5 and ∼5.5 stacks from Bethermin et al. (2020) to build the second and final IR template (IRV2). Adding UV and optical data to IRV2, we fit the entire (detected and upper limits) sample.