CompCooler Single Chamber Quick Release Detachable BladderThe Cooling Bladder is designed with a single chamber that provides the User with the energy necessary for body cooling in the form of frozen water. Quick-connect inlet and outlet fittings on the bladder work in conjunction with the pump in the CompCooler personal cooling systems. Choose between three capacities, 3.0 liter for use with CompCooler Backpack and Univest personal cooling systems and 1.5 liter for use with Waistpack or thighpack personal cooling system, 5.0 liter for backpack personal cooling system.Quick release fittings provide an easy connection to CompCooler personal cooling systems. Roll-top slider has large opening for easy filling and draining of coolant water. Fully frozen 5.0L bladders will provide 2C - 5C (36F - 41F) coolant water for 4 to 6 hours. Ice cubes can be used instead of freezing water. Cooling time will be reduced. Extra bladders can be purchased and prepared for extended cooling time.Features:Single Chamber Quick Release Detachable BladderIce cubes can be used instead of freezing water.The Cooling Bladder is designed with a single chamber that provides the User with the energy necessary for body cooling in the form of frozen water.Quick-connect inlet and outlet fittings on the bladder work in conjunction with the pump in the CompCooler personal cooling systems.Roll-top slider has large opening for easy filling and draining of coolant water.