The Smart Pot® is a soft sided container that is a great improvement over plastic pots. The soft fabric sides allow air to pass through to the root zone. This inhibits the circling of roots often found in plastic and other solid wall containers, thereby increasing the number of small feeder roots. It allows excess heat to pass through keeping the root zone cooler and more in tune to natural growth found in soil. All this combines to improve plant growth and vigor. Plus, they can easily be cleaned at the end of the growing season and reused again and again. Great for any potting soil. Can be used as containers for hydroponics.