If you are interested in a more natural or green alternative to classic hot tub sanitation such as chlorine and bromine, then this kit is perfect for you. Leisure Time's Free Complete Spa Care system eliminates the use of skin irritating chemicals with harsh scents, while still providing an efficient method for sanitizing your hot tub. The Free kit contains all the essentials needed for hot tub maintenance, including an instructional DVD explaining the products included in the kit and how to use them.