This phone cases is 100% biodegradable and are therefore extremely environmentally friendly. This cases are made of a combination of wheat straw, plant-based biopolymers and contain organic ingredients. Our base material meets U.S. (ASTM D6400-04) and E.U. (EN 13432) and OK COMPOST HOME standards, and passed the ROHS, REACH, FDA test in the SGS testing agency. The biodegradation method is that there are many microorganisms in the soil. The microorganisms secrete "decomposing enzymes". Many materials (such as lipid structure) are easily destroyed by interfering enzymes. They are incorporated into the macromolecular structure. This new polymer chain is easily cut by decomposing enzymes and becomes a small molecule compound. This achieves the purpose of degradation. 100% degradation of such products is generally not based on petrochemical materials, or natural or synthetic materials. After such macromolecular materials are used, the polymer chains can be short molecular chains, and the short molecular chains must be in another under some other conditions, it is degraded into carbonic acid and water, and the polymer material is completely degraded without causing any pollution. The complete biodegradation material need to meet the use requirement in the tensile, tear, impact, sealing strength. So this case features with the same protection function as usual phone case: - Top-Notch Protection: Shock-proof, Drop-proof, Anti-scratch and Durable enough. - This eco-friendly phone armor provides full body protection (with four air-cushion at corners). Raised bezels ensures extra protection for the screen and camera. - Drop protection: This eco-friendly phone case also protect your phone from daily drops, We’ve had the Grashine Case tested to far beyond your average phone drop out of a pocket. - Access to all ports, controls & sensors.