Aircast Knee Cryo/Cuff (Cryo Cuff Knee) Self Contained by DJO Canada is used by those with knee injuries. It gives complete coverage to knees. Self-contained knee Cryo/Cuff can be filled with water and ice. It remains cold for atleast an hour. There is no need of any cooler with the self-contained cryo/cuff. Comes with a hand bulb to add compression.