In another embodiment, the face mat has {HEAD ~ an upright portion} of {TAIL ~ extended height} and fingers extending from its upper and lower edges for engagement over the face mats thereabove and therebelow 
In another embodiment , the face mat has { HEAD ~ an upright portion } of { TAIL ~ extended height } and fingers extending from its upper and lower edges for engagement over the face mats thereabove and therebelow
OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD REL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH