Weed Barrier Mat 3'x250' 6ozGrow1 Weed Barrier Mats are yet another weapon to add to your arsenal of defense for your roots. Grow1 Weed Barrier Mats offer the best way to battle bugs and pathogens and provide an extreme amount of protection for your plants roots. Grow1 Weed Barrier Mats feature a dual layer 6oz (170g) fabric, heavier than most others on the market. The dual layer fabric material is comprised of a woven, needle punched 3. 5oz (100g) layer as well as a non woven