FieldTurf  FieldTurf is a brand of artificial turf playing surface. It is manufactured and installed by FieldTurf Tarkett, a division of French company Tarkett Inc. FieldTurf is headquartered in Montreal, Quebec, Canada, and its primary manufacturing facility is located in Calhoun, Georgia, United States. With a design intended to more accurately replicate real grass, the new product rapidly gained popularity in the late 1990s and changed the industry. The surface is composed of monofilament polyethylene blend fibers tufted into a polypropylene backing. The infill is composed of a bottom layer of silica sand, a middle layer which is a mixture of sand and cryogenic rubber, and a top layer of only rubber. The fibers are meant to replicate blades of grass, while the infill acts as a cushion. This cushion is intended to improve safety when compared to earlier artificial surfaces and allows players to plant and pivot as if they were playing on a grass field. Each square foot of turf contains about 3 kg (7 lb) of sand and 1.5 kg (3 lb) of cryogenic rubber. FieldTurf does not use shock-absorbency pads below its infill. The backing of the turf is a combination of woven and nonwoven polypropylene. These materials are permeable and allow water to drain through the backing itself. Jean Prévost bought the patent of the FieldTurf product in 1988 and originally named his Montreal-based company SynTenni Co., a name which would eventually be dropped in favor of FieldTurf Inc. In 1995, John Gilman, a former Canadian Football League player and coach, joined FieldTurf as CEO. In 1997, FieldTurf made its first major installation for a professional team, at the training facility for the English Premiership's Middlesbrough F.C.. , FieldTurf has installed over 7000 athletic fields. In 2005, French flooring manufacturer and minority shareholder Tarkett increased its share in FieldTurf, which led to the integration of the two companies. FieldTurf is now a part of the Tarkett Sports division, part of the holding company Tarkett SA. In May 2010, FieldTurf acquired the American company EasyTurf of San Diego, California, as a way to gain entry into the rapidly growing residential and commercial synthetic grass markets in the United States. Some evidence shows higher player injury on artificial turf. In a study performed by the National Football League Injury and Safety Panel, published in the October 2012 issue of the "American Journal of Sports Medicine", Elliott B. Hershman "et al." reviewed injury data from NFL games played between 2000 and 2009. "...the injury rate of knee sprains as a whole was 22% higher on FieldTurf than on natural grass.