New Balance Men's MR663 Running Shoe 100% Synthetic and mesh Rubber sole A lightweight running shoe designed for the casual runner seeking light stability and a well-cushioned ride Breathable synthetic air mesh upper with synthetic overlays for lightweight comfort and support ABZORB cushioning in the forefoot for exceptional shock absorption and STABILITY WEB delivers midfoot support N-ERGY in the heel delivers New Balance's most advanced shock absorption and cushioning Solid N-Durance rubber outsole provides maximum durability