The Thermo-Star 1000 is an extra large compost bin constructed of Thermolen®, a polypropylene made from 100% recycled post-consumer plastic. The excellent insulating characteristics keep heat contained to help material decompose quickly and completely even in cool weather conditions. Thermolen® is a UV-stabilized and weatherproof material that provides a lifetime of use. Ventilation slots provide aeration for compost materials, and finished compost can be removed from any side of the unit. Easy assembly without tools by means of a practical hinge system. 100% recycled material.