A flexible hose for conveying fluids and suitable for high temperature environments, in one embodiment the hose assembly comprises a thermal paint coated nipple, a core tube, a thermal insulating layer surrounding the core tube, a cover layer surrounding the thermal insulating layer, and a vented jacket surrounding the cover layer. The thermal insulating layer may be a fibrous material such as a silica fiber. The cover layer may be thermally stable up to 750° F. or higher. The vented jacket may be a wire braid having interstices therein and formed from a corrosion resistant material.