Phee board is a flat panel made from the leaves of seagrass Posidonia Oceanica and biological resins. To make the board, the seagrass is collected, cleaned and dried. The seagrass is then compressed with bioresin into a board material.

Posidonia Oceanica is a seagrass species that is endemic to the Mediterranean Sea. It forms large underwater meadows that are an important part of the ecosystem. However, when washed up on shore, it can form a nuance and eyesore, which is why it is removed from beaches and often ends up on the landfill.