Correlation between the inclination and the silicate index for our sample (stars) compared with the Spitzer sample (circles) from Suárez et al. (2023). VHS 1256 b is also included with a triangle marker and black error bars. The upper panel is colour-coded according to the J-K_S MKO colour anomaly calculated from young objects in the Ultracool-Sheet (Best et al. 2024). The lower panel is colour-coded according to the spectral type of each object. 2M0642+41 is not present in this figure, as it is a T dwarf with no silicate absorption feature present in the spectrum.