A flexible conduit insulated to prevent unwanted heat transfer. The conduit is insulated by a jacket-like component that creates a space between the conduit and the jacket, where the gap can be filled with air or some other insulating material. The jacket is sealed to the flexible conduit by sealing components that are configured to slide along end cap portions of the flexible conduit. Because the conduit is flexible, it can couple two other conduits that move relative to one another such that fluid can flow from one area to another via the flexible conduit.