MiraDRAIN 6200 XL is a high-strength drainage composite consisting of a durable, nonwoven filter fabric that is bonded to the individual dimples of a molded polystyrene core to minimize fabric intrusion into flow channels due to backfill pressure. The filter fabric prevents the passage of soil particles into the core while allowing subgrade moisture to pass freely. Its flat side fits snugly against wall surfaces, making this product ideal for foundation walls, retaining walls, bridge abutments, and other structures. Designed for use in high-flow, high-compressive strength, vertical drainage applications where single-sided subsurface drainage is needed, MiraDRAIN 6200 XL can also be used as a protection course over waterproofing membranes when added protection is desired.