Flexamat is a tied concrete block mat used in swales, ditches, slopes and shorelines as a hard armor against erosion. Flexamat’s concrete squares are tied together with a high-strength geogrid, and come in rolls to ensure efficient installation. In addition to handling high flow water runoff, Flexamat also allows vegetation growth. Maintenance with Flexamat is minimal. Once the grass covers the product, landscapers can mow right over Flexamat.