Detailed Product Description usage:1) cold compress : physical therapy for traumatic hemorr-hage , heatstroke , itch , headache , strain , scald , fatigue . 2) ... hour before use2) hot compress: put the mask into microwave oven for 30 seconds on a medium setting to get ideal temperature ... , or put it in hot water for 10 minutes . 3) it's suggested to cover a cloth ...