Heavy grade woven plastic fabric. Water gets through, weeds don't. Works great with tomatoes, peppers, eggplant, squash, kale, basil, melons, fruit trees, and more. For small farmers with limited time and labor this weed fabric option is a must. The heavy grade nature of this product allows it to be removed each fall, stored, and used again in subsequent years; burning holes as opposed to cutting holes for plants to grow through ensures that fraying of the woven plastic is kept to an absolute minimum.