The Vevor tree watering bag set provides slow, deep watering for newly planted or drought-sensitive trees. Each bag holds 20 gallons and gradually releases water over 5 to 9 hours to help moisture reach the root zone. Built from heavy-duty weather-resistant PVC, these bags are designed for repeated outdoor use. The 12-piece set fits trees with 1" to 4" trunk diameters, and two bags can be connected for larger trees. A wide fill opening and zip-around design make setup and refilling quick and simple.