Isochrones and iso-mass curves predicted by different evolutionary models. Shown are the 1, 10, 20, 25 and 50 Myr isochrones (dash-dotted lines, from top to bottom panels), and the iso-mass curves (solid lines). The 25 Myr isochrone correspond to the age of the β Pic-MG, and is drawn in red. The blue shaded areas correspond to the observed values and their error bars for each component of system TWA 22, A and B.