Design: A lightweight upper gives you a minimal feel without sacrificing comfort for longer distances Breathable and drains well for the steeplechase, yet it still sports a snug fit Specifically engineered areas for extra durability and containment once you lace up tightly The Mamba is a little more connected to the track, offering a lightweight feel and responsiveness for all distance races The Nike Racing shoelace is lightweight with notches and just a little stretch that allows for a secure fit that stays tied In-Shoe Comfort: Added midfoot system which the Mamba 5 didn't have for foot security and durability Foam under the heel gives you a little more energy return in your stride to ensure you, particularly steeplechase runners, are supported when you land on the track Traction & Durability: Full-length external carbon fiber plate with six built-in pins for rigidity and traction Refined spike plate with updated spike placement and reduced pins help save weight Additional Details: Designed for 800-10,000 m distances and Steeplechase events