a) a plurality of {HEAD ~ polymeric, elastomeric microspheres} wherein {TAIL ~ the microspheres} comprise the reaction product of 
wherein
a ) a plurality of { HEAD ~ polymeric , elastomeric microspheres } wherein { TAIL ~ the microspheres } comprise the reaction product of
OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD HEAD REL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH