Our bags improved points below: a. Heavier Green Rugged PVC Tarpaulin Fabric, stronger and more sturdy; b. Larger Zipper with Reinforced Double Stitching Throughout, hard to broken or ripped out at the threaded area; c.4CM Wide Handle Tape, more comfortable and strong; d. Two micro-perforated release holes along bottom seam, ensure the bag empty in approximately 3 to 8 hours. Save Time & Water& effort: Bag designed to provide a drip irrigation system directly to tree roots over extended period of time, ensure your newly plated tees survive their crucial first year after being planted. It eliminates the severe water stress new trees endure after transplanting by delivering a high volume of water directly to their root system. This bag can hold up to 20 gallon of water. Single bag fits min.1 inch to max. 4 inch diameter tree with branches at least 25" from the ground; Use 2 single bags zipped together back-to-back to water 4" to 8" diameter trees. Wrap the bag around the tree base, zip up bag, insert hose in opening below the handle and begin filling(hose max 3 inch diameter); Drip holes will release water slowly after an initial flow of water; Continue to fill bag to 1/4 capacity, then lift up gently on straps at top of bag to expand bottom, and fill bag with water to desired level and continuously watering. Refill bag 1 to 2 times per week or as needed. Refill bag with clean water 1 to 2 times per week or as needed. If using pre-mixed water-soluble fertilizer, make sure that it is dissolved.