... Size: 20.5 x 15.5 cm Instant Hot Cold Pack:Specification:Size:20.5cm x 15.5cmGram ... cold/hot bag into freezer to be refrige for half an hour before taking out for use.Hot ... compress: put the cold/hot bag into microwave oven to ... hemorrhage, heatstroke, itch, headache, stain, scald , fatigues.Hot compress: alleviate rheumatic pain, neural pain, sciatica,vertebral, ...