The Gro Pro? Elite Black Commercial Grow Bags are constructed from plastic-coated mesh, which is heavy duty and durable. The plastic coated mesh provides aeration, enhancing root structure, resulting in a vigorous plant with more fruits and an increased insect and disease resistance. The Commercial Grow Bags are double hemmed to hold shape when empty. The easy-to-breath, plastic-coated mesh prevents circling roots and air-prunes the plant's root structure. Each Commercial Grow Bag is tapered toward the top for easy plant removal. The grow bags are durable, washable and reusable. Resistant to UV light.