CCW MiraDRAIN 9800 filter fabric is bonded to the individual dimples of the molded polystyrene core to minimize fabric intrusion into the flow channels caused by backfill pressure. The fabric provides unmatched filtration, preventing small particles of soil from clogging the drainage channel while allowing subgrade moisture to pass freely. MiraDRAIN 9800 is designed for use in high-flow, high-compressivestrength, horizontal and vertical drainage applications where maximum filtration is required for subsurface drainage. The flat side of MiraDRAIN 9800 fits directly against wall or deck surfaces making it ideal for planter, green roof and foundation wall applications. MiraDRAIN 9800 also serves as a protection course over CCW Waterproofing Membranes.