During this program Fiber Materials, Inc. (FMI) will develop innovative yet practical methods for preparing Phenolic Impregnated Felt (PIF) materials for thermal protection system (TPS) segments and heat shield assemblies. Future mission flight environments and designs, such as those anticipated for Mars EDL missions, will require a variety TPS options to accommodate entry system designs. The capability of the developed PIF solutions will address various vehicle shapes, integration methods and the ability to deploy a flexible TPS. Testing of mechanical and thermal robustness, heat exposure and surface recession under representative mission conditions will be conducted in a two phase program approach. The Phase I program will assess materials, designs and processing options that can be cost effectively manufactured and assembled. The material approaches, design options, fabrication/assembly methods, Phase II work plan, Phase II proposal and final report are delivered at the conclusion of the Phase I program. During the Phase II program, a mission-applicable PIF TPS utilizing the developed material system will be demonstrated and tested under representative flight conditions. The proposed materials, designs and methods are currently TRL ¡Ü 3. It is anticipated that TRL ¡Ý 5 will be achieved at the conclusion of a successful Phase I and Phase II program.