Hawley Products Company is a manufacturer of loudspeaker components. The company is the oldest manufacturer of loudspeaker diaphragms in the world. Historically, the company produced a variety of products composed of fibrous or plastic materials, including helmets, globes, microwave trays, automotive components, suitcases, and furniture. Most notably, the company is remembered for its World War II military helmets and helmet liners used by soldiers in the United States Army, Marines, and Navy. Hawley Products is the original designer of the M1 steel helmet liner.