In plants, leaf surfaces are dotted with stomata (openings or holes) bordered by guard cells that open and close the pore. Which helps to keep moisture inside stems longer and, therefore, hollow blade technology mimics the same process, lessens the temperature of a lawn. The hollow vein in the center of the grass blades makes up not only for the genuinely naturalistic look of the grass, but also supports its ability to keep the temperature of the lawn stable and cool in hot climates. Transpiration serves to evaporatively cool grass as the escaping water vapor carries away heat energy. Transpiration, occurs through the stomatal apertures, a process that cools plants. Incomparable Hollow blade design by GST is unlike anything on the market.