On the exterior surface of {HEAD ~ the outer sheet} 14 a foam layer 17 having a thickness from {TAIL ~ 1/8 inch} to 3/4 inch is secured by sealing it to this surface 
On the exterior surface of { HEAD ~ the outer sheet } 14 a foam layer 17 having a thickness from { TAIL ~ 1/8 inch } to 3/4 inch is secured by sealing it to this surface
OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH OTH OTH OTH OTH OTH TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH