... .5 cm Instant Hot Cold Pack:Specification:Size:20.5cm x 15.5cmGram:200gMaterial:PVC+Nylon Fabric Usage:Cold compress: put the ... for half an hour before taking out for use.Hot compress: put the cold/hot bag into microwave oven to be ... for traumatic hemorrhage, heatstroke, itch, headache, stain, scald , fatigues.Hot compress: alleviate rheumatic pain, neural pain, sciatica,vertebral, pain, improve mucous ...