&NA;Smart variable geometry socket (SVGS) technology provides a method of dynamic volume management for lower limb amputees. Because amputees experience residuum volume changes during the day and over time, the fit of their sockets may vary. Currently, socks are often added or removed to maintain a stable and comfortable fit. SVGS technology automatically and continuously accommodates for residuum volume changes to maintain the fit of the socket. The system functions by adding and removing liquid from the intrasocket environment, regulated dynamically by intrasocket pressure. SVGS rationale, theory of operation, alternative approaches, and clinical relevance are described.