Composite FEROS spectrum of HD 96264A (in grey) compared to a combined synthetic model (in sky blue) resulting from the best fitting FASTWIND models to each stellar component (T_eff = 33 kK, log g = 3.70 dex and log Q = −12.7 for component A; T_eff = 30 kK, log g = 3.90 dex and log Q = −12.7 for component B). Both individual models were diluted and added in order to obtain the composed model. All FASTWIND models in this figure have Y_He = 0.09 and β = 0.8.