Per square meter, permeable pavers offer less stormwater infiltration than porous and pervious pavers, so to achieve the same results, a project would require additional pavers. Description from xeripave.com. I searched for this on bing.com/images
attractive paving made of concrete masonry units with gravel-filled gaps in between. Water seeps through the spaces and into a thick substrata of angular, crushed rock. The voids between the rocks act as a temporary sponge.