How does it behave in cold climates? All fields, no matter what infill is used, will freeze in extremely cold climates. The real issue is how fast they thaw out. BrockFILL is a hydrophilic, natural material that will retain moisture much like a natural grass field. This means an artificial turf field with BrockFILL will behave like a natural turf field in cold climates. However, the fibers in artificial turf will still heat up and melt snow faster than natural grass. A salt solution or Magnesium Chloride for snowmelt can be used to accelerate the melting process.