New Balance Men's MR730 NBx Running Shoe 100% Synthetic and mesh Rubber sole ACTEVA LITE is 24% lighter than standard midsole foam with Dupont Elvaloy and Dupont Engage for optimal compression set properties Stability Web provides optimal arch support thats both rigid and lightweight while preventing midfoot flex Full length ABZORB Strobel board Ndurance is a rubber compound for maximum durability used in high wear areas ABZORB provides a superior blend of cushioning and compression set features with Dupont Engage and Isoprene rubber for the ultimate ride