Core components are direct evaporative cooling pad-"multi-layer corrugated fiber composite materials" wet curtain is Sweden's patented invention, it is through a special "multi-layer corrugated fiber composite material", which is characterized by: with good water absorption and ventilation performance, firm texture, water resistance without deformation and corrosion resistance, the normal service life of over 5 years. "O blue" use of evaporative cooling pad, the heat transfer area is 100 times times the surface area, thus the cooling effect is remarkable.