The Viagrow 100 gal. Fabric Aeration Grow Bag with Handles is durable enough to last for multiple seasons of gardening while creating an oxygen healthy root system for the plant. Designed to allow roots to breathe, these beds stand up well to heavy harvests and can be used for soil or hydroponic applications both indoors and outdoors. The mini raised beds are made of 100% new polypropylene (pp) and are environmentally friendly. Please note that our mini raised beds are measured in trade gallon. A trade gallon is a term used to denote the sizes of standard plant containers in horticultural Industries. A trade gallon is equal to approximately 0.71 U. S. liquid gallon. Each grow bag holds 100 gal.