This product is a hydrophobic, conductive carbon cloth substrate designed for use in fuel cell and lithium-air battery research. Manufactured by CeTech under model WOS1011 (part number MA-EN-CU-0039), it features tailored surface treatment for compatibility with acidic electrolyte environments. The woven carbon fabric provides a porous, electrically conductive backbone suitable for electrode fabrication or as a gas diffusion layer in electrochemical cells. Its hydrophobic properties help manage liquid water in low-temperature fuel cell systems, while the material's structural integrity supports consistent performance in laboratory-scale experiments. Available in 20×25 cm sheets, this substrate is commonly employed in proton exchange membrane fuel cell (PEMFC) catalyst support studies and lithium-air battery cathode development. The technical specifications align with typical requirements for advanced energy conversion and storage research.