Why You'll Love It: The Supercomp features an aggressive carbon fiber plate combined with a super foam for add propulsion around the track Category: Distance Track Spike Featuring a full-length carbon plate with four built-in pins for propulsion and traction, the FuelCell SuperComp LD-X will be your go-to competition spike for long distance races or the steeplechase. Designed to meet the needs of elite athletes, this track spike has a lightweight, high-rebound FuelCell midsole underfoot that provides exceptional energy return, along with innovative Energy Arc technology. The comfortable knit upper is reinforced at strategic points for a structured feel. KEY FEATURES Event: 800m-5000m FuelCell foam delivers a propulsive feel to help drive you forward Designed for long-distance track races (3-10K) and the steeplechase Lace closure Energy Arc pairs advanced carbon fiber plate geometry with strategically shaped and placed midsole voids, designed to increase stored energy to deliver a high amount of total energy returned Ultra lightweight engineered upper for breathability and water drainage Full-length external carbon fiber plate with four built-in pins for rigidity and traction SIZING GUIDE Unisex shoes use men's sizing. For a women's fit, take your general shoe size and subtract 1.5 (ie: a women's 8.5 would be a unisex 7 for this shoe)