Get ready to unlock your true running potential with the Brooks Glycerin Flex. Offering innovative flexibility from midfoot to toe-off, these shoes let your feet move with instinctive freedom. The cutting-edge DNA TUNED cushioning brings harmony to every step with a dual-cell nitrogen-infused foam. The large cells in the heel absorb landings like a gentle exhale, while smaller, spring-loaded cells in the forefoot fire you forward with energized toe-offs. Thoughtfully crafted to support your stride, the Brooks Glycerin Flex lets you glide through miles with a free mind. Brooks Glycerin Flex features: