The Original Chillow is a unique personal cooling pad, only two centimetres thick. Just slip it under your pillow slip for cooling, soothing relief at night. How do they work: Chillow Pillows use SoothSoft technology with water to absorb and then dissipate heat back into the air producing a natural, cooling effect with memory foam comfort. It requires a one-time activation and provides a constant cooling that requires no power or refrigeration. Selling as are surplus to requirement as we have several already. Unused and boxed with instructions.