The back has a texture that help keep the Rubber Mat from sliding around in the rain or snow, while the open design lets dirt, rain and snow pass through. When needed, the Stair Treads are easy to clean, just spray of with the hose, or scrub with mild soap.
I was thrilled when these arrived and they were so sturdy and attractive. They really added a nice look to our patio deck steps. They also help clean off your shoes before entering the home.