First generation: 1962-1977.PP fiber products, no sand, no elastic layer, burns to the skin, the maintenance consumption is large, the price is expensive, the length is between 10mm and 12mm.

Second generation: 1975 to present.PP fiber products, began to fill quartz sand, have burns to the skin, the maintenance of water consumption, the length of about 25mm.

Third generation: 1982-1985.PP fibrous grass containing fibril, filled with sand, inelastic layer, hard, and burns to the skin.The length is about 25-40mm.

Fourth generation: 1985 to present.PP or PE fibrous grass containing raw fiber, filled with sand, has a hard texture, burns to the skin, and increases to 50-60mm.

Fifth generation: 2000 to present.Each grass stem is single fiber filament of PE, filling sand or rubber granule, soft, the skin burns small, the bottom has elastic buffer layer, grass fiber anti-uv performance is good.

Sixth generation: up to now.Every blade of grass stems for open web single fiber filament, soft, basic no skin burns, grass fiber UV resistance, the whole system including the elastic cushion layer, solid filler, increase the buffer for the sport, like natural grass.

Seventh generation (latest generation) : 2015 till now.The nutrilite mobile no particles fill free artificial lawn grass straight wire stem for double ribbed single fiber filament, combined with the high elastic silk, filled with quartz sand, avoid filling colloidal particles, safe environmental protection, mobile shop again, quick and easy construction, no skin burns, good elasticity, stimulates bone to teenagers.