Spectra of 13 lens galaxies observed with the X-shooter spectrograph on the VLT. In each panel, the gray line shows the observed spectrum, and the red line presents the best-fit model from pPXF. We also plot the smoothed version (the yellow line) of the observed spectrum. The gray bands mark the wavelength range we excluded from the fit and typically they correspond to the atmospheric absorption lines. Each panel also indicates the name of the system, the lens galaxy redshift, and prominent absorption features in the spectra.