Flow Filled artificial turf is influenced by the environment from the first day on. Dust, pollen, rests of plants and abrasion material are washed by rain into the fine cavities of the filling. The result of this process is a total hardened surface with no longer water permeability. The covering infiltrated with particles of humus causes the ideal breeding ground for algae and moss. An artificial turf that got dirty like that can no longer meet its purpose. It exists an extreme danger of slippin