... can adapt unlimited times of alternately cold or hot use after pre-cooling or pre-heating treatments.4.size,weight,materialIndications:cold ... vertebra trouble,sciatica,and strain or lumbarUsage:Cold compress:Use after put in the ice box or freezing box(minus 10 ... eye masks,· facial masks,· cool scarf/belts,· bottle coolers,· ice cooling mat· cool pet mat/clothes,and other products. All of ...