Developed by our service technicians as a way of cleaning the Cool Shirt and Cool Vest systems. This non-toxic bio-degradable solution contains a fungicide yet is safe to use in all Shafer cooling systems. Regular use of this additive will not only help clean the system but it will also improve the performance and life of the system pump. Shafer Enterprises recommends the use of 2 ounces of Maintenance Solution every time a system is used and 6 ounces for the large MPS systems.Regular use of the Maintenance Additive could add years of life to your system and help keep the system working at its peak performance. Instructions for Use: Simply pour the Maintenance Solution into cooler and then fill with ice and water. Use the system as normal. Pit Stop USA offers Cool Shirt Maintenance Additive - 16 Oz. Bottle MA-16 at low everyday prices. Be sure to check out all of our products from Cool Shirt including Cool Shirt Cool Shirt Parts and Accessories.