Riverstone Portable Composting Sack The Riverstone Portable Composting Sack is the cost-effective, easy way to create compost right in the comfort of your own backyard with your family. This Composter Sack works like other hard sided composting bins - you put in your nitrogen and carbon rich materials, turn them from time to time, and let them decompose and turn into fresh, rich, black gold for your lawn and garden. The key to the Composting Sack is the rot-proof outer material that allows for air circulation and moisture to enter the Sack. The inner liner helps to keep the moisture inside the sack, which is a key component of composting. The design also helps to keep odor down. The dark black color attracts heat which helps to speed up the composting and decomposition process. The Composter Sack Composting System is ideal for learning how to compost with your family. It is cost effective and easy to use generating the same end results. Features: . Portable . Easy to use, set-up takes under 1 minute . Made from Rot-Proof material for years of work use . Custom Pull Cord locking system . 5 year Limited Warranty Item Specifications: Size: 60 Gallon 100 Gallon Dimensions: 60 Gallon: 28"W x 34"H 100 Gallon: 30"W x 38"H