Hypoknit upper designed to provide strategic areas of stretch and support Bootie upper construction hugs your foot for a snug, supportive fit Fresh Foam  midsole foam with approximately 3% bio-based content Bio-based content is made from renewable resources to help reduce our carbon footprint Meets New Balance’s green leaf standard: upper is made of 50% or more recycled content, and at least one midsole/outsole material contains a minimum of 3% bio-based or 5% recycled content New Balance Women’s W880B13 (W880V13)FRESH FOAM