New Balance Women&#39;s WRX506 Track Shoe,Teal/Brown,10.5 B,New Balance" /> 100% Mesh ACTEVA LITE is 24% lighter than standard midsole foam with Dupont Elvaloy and Dupont Engage for optimal compression set properties 3/4 ROCK STOP plate utilizes a flexible protective layer that protects feet from rocks and shock, minimizing pressure, and dispersing shock energy 4 spike configuration NLOCK is an integrated lacing and webbing system that provides optimal fit, support and security Removeable spikes