Discover our 20 - gallon tree watering bags, available in a pack of 4. With an 8 - 10 hour slow - release feature, they're perfect for summer watering of newly transplanted saplings and valuable trees. Each bag, made of high - quality, sun - resistant PVC, measures 34.6 x 36.2 x 0.4 in. . It can hold about 20 gal. of water and slowly release it, preventing drought stress. These bags are durable, leak - proof, and reusable for multiple seasons. They save over 30% more water than traditional methods and work well in various soil types. Using them is a breeze: just wrap around the tree base, zip it up, fill with water, and lift when 1/4 full to expand the bottom. Whether you're a professional landscaper or a backyard gardener, these bags are suitable for gardens, backyards, farms, and parks, making tree - watering effortless and efficient. Material: Plastic.