Have a flexible upper material

The Fresh Foam X 1080v12 features:

• Fresh Foam X midsole foam with approximately 3% bio-based content delivers our most cushioned Fresh Foam experience for incredible comfort. Bio-based content is made from renewable resources to help reduce our 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

Secure fit around the heel cup