Design: 3 Single-layer mesh provides lightweight breathability in areas it’s needed most without sacrificing proper containment Single-layer mesh provides lightweight breathability in areas needed most without sacrificing proper containment An arch band secures the midfoot for a dynamic lace-up fit and supportive containment needed in all events In-Shoe Comfort: Additional cushion in the midfoot and heel give a balance of comfort and protection needed for the longer distances and a smooth, propulsive transition for all foot strikes Durability & Traction: 4 replaceable spikes offer elite traction on all track surfaces Lightweight ceramic aluminum material provides durability Additional Details: Designed for events long distance events