Preferably, the OSCL 35 has a Poissons ratio in a range 0.2 0.5, and more preferably the OSCL has {HEAD ~ a Poissons ratio} in {TAIL ~ a range} 0.45 0.5, and a preferred material is a polyurethane with a Poissons ratio of about 0.495 
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Preferably , the OSCL 35 has a Poissons ratio in a range 0.2 0.5 , and more preferably the OSCL has { HEAD ~ a Poissons ratio } in { TAIL ~ a range } 0.45 0.5 , and a preferred material is a polyurethane with a Poissons ratio of about 0.495
OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD REL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH