Heat Aware Twic Cards: HATS-20 Heat Aware Cards-This is a great visual tool for reminding workers and athletes to stay properly hydrated made of PVC material with an encapsulated liquid crystal thermometer attached. Fluid intake chart on back.

Heat Aware Twic Cards: HATS-20 Heat Aware Cards-This is a great visual tool for reminding workers and athletes to stay properly hydrated made of PVC material with an encapsulated liquid crystal thermometer attached. Fluid intake chart on back.

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