This foam layer is co extensive with the exterior surface of this sheet, and is usually attached with {TAIL ~ an adhesive} which joins the foam and {HEAD ~ the surface} so no air space exists therebetween 
This foam layer is co extensive with the exterior surface of this sheet , and is usually attached with { TAIL ~ an adhesive } which joins the foam and { HEAD ~ the surface } so no air space exists therebetween
OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH OTH OTH