VLT-MUSE spectra and kinematics fits with PPXF for DES J0408−5354 (left-hand panel) and WGD 2038−4008 (right-hand panel). The gray rectangles illustrate the data with the height representing the 1σ uncertainty and the width representing the wavelength-pixel size. The red line illustrates the best-fit model. The principal spectral features probing the kinematics are the Ca H & K absorption lines marked with vertical orange lines. The gray-shaded region on the left-hand panel represents the wavelength range excluded from the fit.