Men's BROOKS® BEAST 20 :: Legendary max cushion meets max support in the updated Men's Brooks Beast 20 running shoe. Revolutionary GuideRails® deliver foot-to-knee stability, backed by ultra-soft and durable BioMoGo DNA cushioning. With an enhanced fit and plush Ultimate Sockliner, your Beast 20 dishes out an unbeatable combo of cushioned support for running, walking or being on your feet all day.