Details Fresh Foam X midsole foam with approximately 3% bio-based content delivers NB's most cushioned Fresh Foam experience for incredible comfort. Bio-based content is made from renewable resources to help reduce their carbon footprint. A Hypoknit upper is designed to provide strategic areas of stretch and support Bootie upper construction hugs your foot for a snug, supportive fit Underfoot cushioning and flex zones informed by pressure mapping data Blown rubber outsole at the forefoot provides superior rebound Drop: 8 mm Weight: 10.3oz (M), 8.3oz (W) Category: Neutral Use: Daily training Surface: Road, Track Color Grapefruit