Ecoduty biodegradable stakes are a must for any contract job that demands a top performing staking solution. Made from recycled plastics, the stakes contain an additive to change the polymer structure of the plastic. Once this change is complete (24 to 36 months, the stakes will fall apart and allow microbes to consume the plastic. The byproducts post microbe consumption are water, carbon dioxide and biomass (humus)). Alternating rib design and double hooks grab and stay put.