b'Xeleros Guidance PropulsionSystem GPS . The Propulsion element cradles the rear foot and extends forward to guide the foot into a neutral position throughout the gait cycle. The Carbon Fiber Slingshot propulsion plate provides torsional stability, keeps the foot in alignment, and helps to reduce impact pressure. The dual layer X-Lite midsole provides cushioning and speeds up heel to toe transition.SUPER STABILITYMens Cloudburst - XR377Mens Vapor / Navy - XR3058 - 12, 13 & 14 Medium & Wide GUIDANCEwww.xeleroshoes.com PROPULSIONSYSTEM'