... nanometer ice-pad material Product Size: 15*25cm,20*35cm,25*35cm,30*35cm,30*40cm ,40cm ... 45cm,90*90cm, 90*140cm,ect.Product Name: summer cool cushion Material: Outlayer: Polyester Inerlayer: PVC temperature constant ... material without power supply, do not need pre-cool and economical.it has a cerfication of SGS ... and MSDS. comfortable and cool : the filling material takes 30 C degree, ...