The CoolShirt Round System has been developed to offer a solution for drivers who have limited space available in the cabin but prefer a solid case to store the fluid.Providing up to 2 hours of cooling the Round System contains a threaded lid which ensures easier draining and refilling virtually eliminating spillages. The Round System stores 10 US Quarts (9.5 litre) of fluid and contains an integral 12 volt powered pump which can connect to the vehicles power supply. The system can be installed in a variety of cockpits due to its small footprint and is equipped with auto shut off and quick disconnects for ultimate safety.Cooled water is supplied to the shirt through the water hoses (sold separately).Weight (approx): 3lbs (1.4kgs)