Brooks' most responsive midsole, DNA AMP, does more than cushion. It controls, captures, and returns your energy to help fuel your run, Get a little crazy in the brand-new Bedlam. it's springiest DNA AMP midsole joins forces with its holistic Guiderails suppor,it's innovative Guiderails technology proactively guides your feet into proper alignment. The result is less heel and shin rotation, knee motion, and more peace of mind, A hammock saddle secures your foot within the comfort of a premium Fit Knit upper that hugs the contours of your foot.