HG STUDS FOR HARD TERRAINS
Football boot HG (Hard Ground) outsoles are made from materials that are very resistant to the abrasion caused by the hardness of the terrain. This resistance is obtained by using denser materials, sacrificing a bit of flexibility, and adding more studs than usual.
Very recommended: Dirt and first generation artificial turf.
Recommended: Third generation artificial turf.
Avoid on: Natural grass.