The Brooks Beast ’20 continues to be the ultimate in protective comfort. Brooks shifted their focus beyond the feet to the most injury-prone part of a runner's body…the knees. The GuideRails keep you moving comfortably by keeping excess movement in check. Thanks to their patented BioMoGo DNA midsole, ultra-softness and durability are no longer mutually exclusive! Enjoy comfort heel to toe with a spacious yet secure fit thanks to an engineered-mesh upper.