The Worm Inn Proudly manufactured in the U.S.A.The Worm Inn is a flow through worm composting system made from Cordura fabric with a fine mesh zippered top. The zippered top makes it easy to open to add new worm food, allows for good air circulation, and helps keep fruit flies and other critters out of your worm bin. As strange as it may sound to keep your worms in a bag, there are a couple of real advantages to using this system. The Worm Inn (being made of nylon fabric ) is very durable and breathes very well, promoting an aerobic (oxygen rich) condition eliminating the chance of getting anaerobic (oxygen depleted) conditions in the bottom of the worm bin. It is the anaerobic bacteria which are responsible for the bad smells that come from rotting food. This is a common problem with plastic worm composting systems. The Worm Inn breathes so well it almost eliminates the possibility of having foul smells coming from your worm bin (Assuming that your Worms are not over feed, which is hard to do using this system). The Worm Inn also has a draw string bottom which allows for good drainage. This makes it almost impossible to get your bedding too wet (which will also cause anaerobic conditions) because it drains so well. It also makes it very easy to harvest finished castings from the bottom without the need to screen your worms from the castings. You simply add your food scraps and bedding to the top and harvest finished castings from the bottom. Your worms will naturally move up to the top to get to the new food. You may find a few worms in the finished castings, but they will be few and easily picked out and returned to the Worm Inn.