DeWitt FiberGuard 200 Seed Germination and Erosion Control | 4' x 50'This erosion control blanket from DeWitt encourages germination and the growth of strong roots by holding the seed and fertilizer in place and preventing erosion. Made from natural Aspen wood fibers and is lightweight. Features a single photodegradable netting layer on top of the wood fibers. Ideal for landscapes, golf courses, and other areas where grass and ground cover need to grow.