Gravity scores from Allers & Liu (2013) obtained for our targets (purple circle = TWA 28, smaller dark blue circle = TWA 27A, and light blue circle = TWA 27B), and for other M3–L7 objects with different ages as a comparison. We show for comparison field objects (McLean et al. 2003; Cushing et al. 2005), young companions (Allers et al. 2007; Bonnefoy et al. 2014), young β, and γ dwarfs. For members of α Persei, Upper Scorpious, Taurus, and ρ Ophiuchi, we include the value of the FeH index (Martín et al. 2017).