Design: Lace knit upper for improved breathability In-Shoe Comfort: Extra cushioning with a thicker midsole making it a perfect beginner sprinting shoe Traction & Durability: Carbon fiber plate delivers an even snappier, more responsive ride than its predecessor 6-pin Pebax® spike plate Additional Details: Weight 4.94 oz Neutral stability Designed for 400 to 1600 meter events