The concept of feasibility has received a significant amount of scrutiny in recent years. Despite the diversity of accounts, all agree on the assumption that feasibility considerations have a practical function in guiding action. However, the two most important accounts (by Gilabert and Lawford-Smith, and by Wiens) seem to scarcely speak to this practical function because they provide a third-personal reconstruction of feasibility constraints. In this paper, I argue that, to understand feasibility constraints in a way that matters for guiding (...) action, we should switch from a third-personal to an agent-centered perspective. I show that relevant constraints can be Barriers, Limitations, Boundaries, and Rubber Walls to the extent that they concern nomic impossibilities (Barriers), resources (Limitations), agents’ abilities (Boundaries) or other people’s unwillingness (Rubber Walls). Understanding constraints through the lens of their qualitatively different natures opens the way for addressing the problem of how to respond to them. (shrink)