100% compostable (only compostable in industrial facilities) plates. Made from plant-based materials. Microwave safe. Why choose Hefty Ecosave. These 100% compostable plates are made from plant based materials and deliver the heavy duty quality that you've come to expect from Hefty plate. Heavy duty. Compostable (Commercially compostable only. Facilities may not exist in your area. Not suitable for home composting) plates.