Energised Cushioning Built with the best energy return, the DNA AMP midsole gives you back more of the effort you put in. Guide Rails Holistic Support System We’ve shifted our focus beyond the feet, to the most injury-prone part of a runner’s body – the knees. Guide Rails keep you moving comfortably by keeping excess movement in check. Secure Fit, Incognito Comfort The dynamic midfoot wrap makes feet feel secure inside of the highly adaptable Fit Knit upper.