Heavy duty. Made with plant based materials. 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. Compostable (This product is not suitable for home composting). BPI Compostable. Commercially compostable only. Facilities may not exist in your area. Compost manufacturing alliance. Composter approved.