... effect is obvious within seconds 4,10000 times ice cushion product descriptionName of the product cool ... (waterproof treatment)filler a specific high-tech nanometer ice-pad material Product Size 30*35cm,30*40cm ... technology, the inner melt to liquid when the ice-pad absorb the heat diffused by human body ... the pressurization of 200kg.Notes:1, Prevent the ice-pad from sharp-edged tools and fireworks. ...