The Z-CORE offers a barrel featuring the Z-CORE Internal Core Technology that is made from high-grade Hyperlite Matrix (HMX) Alloy

Specifications: -10 Length to Width Ratio

2mm Hyperskin Helix Grip

comfortable feel 3-ply bladder for better air retention and moisture control

The Ghost X also features the longest composite barrel

New New Balance MXCS7YB Track&Field Spikes Size 11 Mens Grn/Blk Cross Country barely used and great condition! The Z-CORE offers a barrelThe XC Seven performance running spike presents an aggressive design featuring leading technology demended by next level athletes. Features like REVlite midsole cushioning and a 3D screen print on the upper are designed to meet the demands of competitive cross country runners.