The Moso Bag is available in two sizes and is great for both residential and commercial use. For optimal results, position the Moso Bag in an open area; it is safe to place on any surface. A Moso Bag typically lasts for two years as an air purifier, just place it in the sun once a month to rejuvenate. After the charcoal is exhausted as an air purifier, it is a wonderful addition to the garden. Cut open the bag and put the charcoal into your soil, where it promotes plant growth due to its mineral-rich nature and ability to retain moisture.