New Balance Women's WR740 NBx Stability Running Shoe 100% Synthetic and mesh Rubber sole Medium arch ACTEVA is 12% lighter than standard midsole foam with DuPont Engage for exceptional durability Stability Web provides optimal arch support that's both rigid and lightweight while preventing midfoot flex ABZORB forefoot provides a superior blend of cushioning and compression NDURANCE is a rubber compound for maximum durability used in high wear areas