The first or lower layer of the sole is {HEAD ~ a pad} formed of {TAIL ~ an elastomeric material} which contains a liquid within a set of chambers, one in the heel area and one in the toe area of the sole 
formed of
The first or lower layer of the sole is { HEAD ~ a pad } formed of { TAIL ~ an elastomeric material } which contains a liquid within a set of chambers , one in the heel area and one in the toe area of the sole
OTH OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD REL REL TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH