In 2013 FIFA - with the assistance of the ESTC Shockpad Group - carried out a study to investigate whether shockpads & elastic layers aid the performance longevity of football turf surfaces.
ESTC Shockpad Working Group Performance Guide for Shockpads
Shockpads are often used in the construction of synthetic turf sports systems. The shockpad is laid beneath the synthetic turf carpet and is designed to assist in the sports performance and player protection