SIDOLI, LaraLaraSIDOLI2020-09-012020-09-0120171824-8039http://hdl.handle.net/20.500.12386/27026I present a brief up-to-date review of the current understanding of Supergiant Fast X-ray Transients, with an emphasis on the observational point of view. After more than a decade since their discovery, a remarkable progress has been made in getting the picture of their phenomenology at X-ray energies. However, a similar in-depth investigation of the properties of the supergiant companions is needed, but has started more recently. A multifrequency approach is the key to fully understand the physical mechanism driving the SFXT behaviour, still under debate.ELETTRONICOenConference paper10.22323/1.306.0052https://pos.sissa.it/306/052https://arxiv.org/pdf/1710.03943.pdf2017mbhe.confE..52SFIS/05 - ASTRONOMIA E ASTROFISICA