Rubber sole An internal foam pod at the heel gives you extra cushioning. Light padding on the tongue helps reduce lace pressure at the top of your foot. The laces loop through lightweight side supports that eliminate the need for an arch band. This helps reduce the shoe's weight. A wider toe area gives a roomier fit. Flexibility grooves on the sole give you multi-surface traction in a variety of weather conditions. Continue the next evolution of speed with a racing shoe made to help you chase new goals and records. It helps improve comfort and breathability with a redesigned upper. From a 10K to a marathon, this model, like the previous version, has the responsive cushioning and secure support to push you towards your personal best.