Root pots are made of a biodegradable material that helps facilitate airflow and promote healthy root growth. These pots will break down after multiple seasons of use, approximately three to five years. However, they are strong enough to withstand winds, work great with drip lines and within hydroponic systems. The dimensions of this 20 Gallon container is 20”W x 16”H. This size pot will hold approximately 2.9 cubic feet of soil.