Feature●This is a simple and absorbent soil that swells with water, and does not require sand. Inflates in 5 minutes for more emergency response. The string on the bag allows you to adjust the size of the bag. If water is drawn, it will shrink in 2-3 days under blazing sun●Contents: When in use: 17.7 x 21.7 x 2.8 inches (450 x 550 x 70 x 1●Polybagged (16.5 x 2.8 x 12.6 inches (420 x 70 x 320 mm)); Material: Polyethylene, absorbent polymer; Processing: JapanDescription This is a simple and absorbent soil that swells with water, and does not require sand. Inflates in 5 minutes for more emergency response. The string on the bag allows you to adjust the size of the bag. If water is drawn, it will shrink in 2-3 days under blazing sun.