The Brooks Beast 20 provides trustworthy support for runners who experience severe overpronation. This version uses the GuideRails® holistic support system to support your stride and keep every step aligned. Land comfortably on the BioMOGo DNA cushion, for an ultra-soft sensation that lasts throughout your run. When it’s time to hit the road, you can count on the Brooks Beast 20 to provide the cushion and support to guide you through each mile Runners who need a shoe with maximum support for overpronation. Runners who are susceptible to knee injuries and need a stable shoe to reduce excess movement. Shoe Technology Upper: Engineered mesh upper and conformable embroidered saddled create a comfortable and secure fit. Ultimate Sockliner adds cushioning for a plush, step-in feel.