Left: Concentration–halo mass relation for the MHUDF sample. The solid coloured lines show the c_vir − M_vir relation from Dutton & Macció (2014) for 0.3 < z < 1.5, while the shaded regions show the 0.11 dex scatter around the relations. The data points are colour-coded according to their redshifts. Right: r_s, DMO = r_vir/c_vir in [kpc] as a function of the halo masses. The dotted black line displays the observed scaling relation for z = 0 low surface brightness systems inferred by Di Paolo et al. (2019), while the solid black line shows the predictions from Dutton & Macció (2014). The data points are colour-coded according to their effective S/N. In both panels, the circles show the regular MHUDF galaxies, while the stars depict the perturbed galaxies. The error bars represent the 95% confidence intervals.