New Balance Men's MR993 Running Shoe 100% Leather and mesh Rubber sole ACTEVA is 12% lighter than standard midsole foam with DuPont Engage for exceptional durability Single density polyurethane heel ABZORB provides a superior blend of cushioning and compression set features with Dupont Engage and Isoprene rubber for the ultimate ride Ndurance is a rubber compound for maximum durability in high wear areas