https://www.amazon.com/Root-Naturally-Soil-Moist-Pound/dp/B010CY7NJY/ref=sr_1_1_sspa?ie=UTF8&qid=1544539984&sr=8-1-spons&keywords=soil+moist&psc=1
Absorbs water like 200 times it's own weight... keeps it from evaporating... I use it outdoors so I don't have to water as often