The filter pad 1, wherein {HEAD ~ the pad layers} having {TAIL ~ a substantially rectangular shape} are connected to each other along three sides thereof to form a pocket therebetween 
having
The filter pad 1 , wherein { HEAD ~ the pad layers } having { TAIL ~ a substantially rectangular shape } are connected to each other along three sides thereof to form a pocket therebetween
OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD REL TAIL TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH