In one embodiment, {HEAD ~ the spacer} includes at least one cushioning segment defining a gap for providing {TAIL ~ the separation} 
In one embodiment , { HEAD ~ the spacer } includes at least one cushioning segment defining a gap for providing { TAIL ~ the separation }
OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH TAIL TAIL TAIL TAIL TAIL TAIL