New Balance Women's WR870 Stability Running Shoe Synthetic and mesh Rubber sole Midsole Material: C-Cap --Lightweight compression-molded EVA provides cushioning and flexibility. Outsole: N-Durance--N-Durance outsole provides long-wearing durability. Cushioning Technology: Abzorb--Abzorb softens the impact, absorbs shock and displaces energy. Heel Technology: Abzorb--Abzorb in the heel offers maximum shock absorption. Model Number: WR870CB