For the composting process in the Air Head toilet, we highly recommend using coir bricks (also known as coco peat) due to their compactness and ease of use. However, a variety of other materials can also serve effectively as a composting medium. These include sphagnum peat moss, non-kiln dried sawdust, coffee grounds, and paper-based pet bedding. While these alternatives can be utilized, it’s important to note that the outcome of using naturally sourced materials can vary, and we cannot guarantee the consistency of the results.