Abstract: Black holes raise fundamental questions about entropy, information, and the nature of quantum gravity. In this talk, I will present an approach in which black hole microstructure is captured by coherent microstates in low-energy string theory: gravitational solitons that share the same asymptotic properties as black holes while replacing the horizon with a regular, horizonless structure. I will first outline methods to construct such solutions in supergravity. I will then discuss their gravitational signatures and the possible emergence of horizon-scale deviations from classical black hole behavior. Finally, I will explain how effective black hole properties, such as absorption, arise from the dynamics of these horizonless configurations.