New Balance Women's WT100 Trail Shoe Synthetic and mesh Rubber sole ACTEVA is 12% lighter than standard midsole foam with DuPont Engage for exceptional durability ROCK STOP is a flexible protective layer that protects feet from rocks and shock, minimizing pressure, and dispersing shock energy EVA foxing construction Puncture resistant toe material SURE LACE is a computer knit lace/chord designed with a reciprocating wave pattern that will not untie under high performance or inclement conditions