New Balance Women's WR883 Running Shoe 100% Synthetic and mesh Rubber sole ABZORB FL midsole foam provides an amazing blend of comfort and performance with DuPont Engage and isoprene rubber NLOCK is an integrated lacing and webbing system that provides optimal fit, support and security SURE LACE is a computer knit lace/chord designed with a reciprocating wave pattern that will not untie under high performance or inclement conditions Ndurance is a rubber compound for maximum durability used in high wear areas Dual-density collar foam