DESIGN: Men’s 8 Women’s 9.5 UK 7 BR 39.5 EUR 41 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: Added cushioning at the midfoot and heel gives you the comfort needed for longer distances and a smooth, propulsive transition for your footstrike DURABILITY & TRACTION: Four replaceable spikes offer optimal traction on all track surfaces. Lightweight ceramic aluminum material provides durability