... use of cross-linking space technology,and remain high water absorption,high water-resistance,rustproof,corrosion resistance and long life service. ... cooling efficiencyy of more than 80%.2,Containing surfactants,natural water absorption,diffusion speed,4-5 seconds for a drop ... Natural water absorption height 60-70 mm per 5 minutes and 200 mm per 1.5 hours,fulling meeting international industry standard. ...