HSE mass profiles of XLSSC 072, XLSSC 100 and XLSSC 102. Left: mass profile obtained using the gNFW pressure model together with the electron density profile. Right: mass profile obtained by direct NFW mass modeling together with the electron density profile. For reference, the vertical dashed lines represent R₅₀₀ estimated using the Y_X − M relation. The corresponding probability density functions for M₅₀₀ are shown as insets in the figures. The shaded region gives a 68% confidence interval.