If your home yard needs to keep costs low while adding simplicity and ease of maintenance, it is a good idea to use polypropylene gravel grid mats as yard paving and foundations. Polypropylene is a recycled plastic and is as a paving base. It has a honeycomb structure, making it the lightest, strongest and most flexible paving material on the market. Gravel grid pads use each small cell to fill with gravel, which disperses the weight of the stone, prevents compaction, and promotes rainwater replenishment; It is conducive to creating a stable, safe garden greening solution.