Synthetic SFD of the Polana family derived from our collisional model. Initially, it was steep (Pantone 7633C, dashed), but since then it has evolved and it is now shallow (blue), in agreement with observations at kilometre sizes (grey, solid). For comparison, the main belt distribution is also plotted (cyan), as well as corresponding observations (Bottke et al. 2015a). Each model was run 10 times to account for stochasticity.