Heavy duty. Microwave safe. Made without PFAS. Strong. Convenient. Compostable. With Hefty Ecosave, the heavy-duty strength and convenience you expect from Hefty are met with sustainability. Using Hefty Ecosave, which is made with plant-based materials that are compostable in commercial facilities, means sending less waste to landfills. Made with plant based materials. Compostable (Commercially compostable only. Facilities may not exist in your area. Not suitable for home composting) plates.