New Balance Women's 880V3 Comfort Running Sneakers Synthetic N-Durance rubber compound for maximum outsole durability T-beam is a lightweight, flexible TPU shank engineered to deliver optimum torsional stability and arch support through a unique center beam design ABZORB cushioning in the midfoot provides exceptional shock absorption Breathable mono mesh; Blown rubber outsole Synthetic/TPU upper; Weight: 252 grams (8