For runners seeking a stable but responsive ride its pure Bedlam. Brooks engineers worked overtime to provide you with two primary benefits: 1. Support that benefits your hips knees joints and feet. 2. Energy conservation that benefits your endurance and finish time. The upper consists of a dynamic midfoot wrap designed to make your feet feel secure inside the highly adaptable Fit Knit. DNA AMP in midsole to return more of the energy you put in. Next-generation Guide Rails for holistic support by guiding your feet into alignment.