The ShockWatch WarmMark® Long Run is a temperature indicator that is disposable and economical. It monitors the temperature of the goods to make sure that they are kept at acceptable temperatures during storage or transport. The indicator is attached directly to the product or packaging for easy monitoring. It helps you determine right away if the product quality is already compromised. If the indicator displays a white color then everything is fine but if the temperature reaches unacceptable levels then the indicator turns red. The red dye continues to progress in the indicator window and stops only when the temperature returns to acceptable levels. This lets shippers and handlers determine the length of time that the product was exposed to unacceptable temperatures.