Improved Irrigation Bag- UV resistant PVC for extended durability in the sun; Built with a dropper helps control water on and off; A smooth zipper is convenient for installation; Easy to fill thanks to a wide hose opening; The sturdy handle makes it easy to handle when full. Slow Release Dropper- Designed with a dropper to control the amount of water according to the tree's needs; Prevents runoff caused by over-watering; The double dropper can simultaneously irrigate adjacent trees and accurately drip onto the ground around the tree; Good for young and newly planted trees. 75 Liter Capacity- The drip bag only needs refilling every week; Water slowly and continuously for 5-8 hours; The deep watering method is the most effective method for watering deep root growth as well as plant transplanting and drought. Small tree and large trunk friendly- Built-in dropper allows to water the small tree by placing a stake to support the bag; Secure zipper allows you to connect multiple bags for large diameter trees. Excellent Customer Service- We always put the customer first.If you are not satisfied with our watering bag at slow release. If you have any questions during use, please feel free to contact us. We will do our best to correct the problems.