Artificial/Synthetic Turf
Artificial or synthetic turf has become more and more widespread over the last decade.
Artificial turf is used as underlay in various sports such as American football, soccer, baseball, field hockey and lacrosse.
Important football (soccer) organisations such as FIFA and UEFA recommend and accept artificial turf as underlay for even Champions League and World Cup games.
There are a couple of ways of constructing an artificial turf field. However in the most common construction, rubber granulate contributes to both the infill layer and the elastic layer/shock pad.