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Accretion inevitably produces disk winds comma which has vast consequences. These outflows can regulate the accretion process comma affect the long-term orbital evolution of the X-ray binary comma and impact their cosmic envi- ronment. However comma it is not established exactly how disk winds are launched comma and how much mass is carried away by them. We propose to study the disk wind of a persistently accreting neutron star across the elec- tromagnetic spectrum with XMM-Newton comma HST and VLT. These simultaneous multi-wavelength data will determine the launch mechanism and mass content of the disk wind. This show-case study will highlight the impact of studying disk winds across the electromagnetic spectrum and pave the way for future observations.