Dalen WXB6 6-Foot by 250-Foot Weed-X Fabric The ultimate porous landscape fabric for permanent applications Rated #1 for stopping weeds by 8 university studies Patented dual-layer material with a 20-year weed-free guarantee Usage ideas: Home landscaping and gardens, under patios and decks, under walkways and paths, vegetable and flower gardens Weed-free guarantee for 30 years