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