Brooks Men's Beast 12 Cradle your feet from heel to toe with Brooks full-length DNA Cushioning system that changes its support with each step based on weight, pace, running conditions and your individual biomechanics Sleep easy at night knowing that the Beast 12's superior cushioning comes from BioMoGo, a cushy layer crafted from biodegradable, earth-friendly materials You'll notice the exception flexibility at the midsole, thanks to OmegaFlex Grooves that allow your feet to move naturally For a smooth heel-to-toe transition, say "Thanks!" to Brooks Caterpillar Crash Pad, a segmented section that ensures both flexibility and stability