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