TetraPOT is a sustainable sea defense system made of organic materials and plants. Distributing TetraPOTs along coastlines will eventually interlock to create a long-lasting sea defense of growing trees and roots that help keep the blocks in place. As plants grow inside out from TetraPOT, the roots will intertwine and gradually become a natural sea defense. The shape and placement will enable TetraPOTs to interlock with each other and form a structured web. The design not only prevents soil erosion, but also helps to protect and create a natural habitat. It’s not only a defense, but also an ecosystem. A home for other livings.