... surgery. Usage:Cold compress: put the cold/hot bag into freezer to be refrigerated for half an hour ... before taking out for use.Hot compress: heat the cold/hot bag in a microwave oven with medium power for ... 60 seconds when be used continuously. Attentions:The ice bag is for external use only. If eye or skin ... (600W, 30 sec-1 min.)3, Heat up to approximately 48,4, Ice-free bag;5, remain soft up to -20 ...