... 2.made of neoprene rubber materail 3.keep cool /warm 4 hours 4.SGS/TUC certification Product description: Name neoprene can coolerMaterialneoprene ... .5cmThickness3--5mmColorgreen,red,black,more than 100kinds of colorsLogosilkscreen printing,hot transfer printingPackage1PC/PP,100PCS/CTNCertificationSGS/TUV/CTIFunctionwaterproof,keep cool and ...