Dead leaves all day long in this one if you don’t want to buy cover material. If you don’t mind buying it, coco coir is the bomb.com. If you have pee in there and use a less dense cover material I bet it will heat up more. I agree deeper than 2 feet helps to get the heat. I have used 4x4x4 piles for loooong periods of time because it breaks down so much so fast it’s almost an endless situation. I do large scale food compost for 1600 women over two weeks and have humanure at home for 10 years
