... is High quality Woven polypropylene1, Growing in this bag,the trees can cut off its long roots ... during transporting.4,carbohydrate gather into the grow bag, which will make the trees grow lushly.5 ... no need to cultivate trees with plastic pot, metal pot and the irrigation system.--save packing cost, ... when transplanting, or transporting, this grow bag can be acted as the packing for roots, ...