éLightweight, breathable, moisture-managing Element mesh and synthetic upper materials. Adjustable mid-foot saddle for added support. Padded tongue and collar. Lace-up closure. Breathable, moisture-wicking Element linings keep feet cooler and drier. Removable molded foam insole. Full-length Brooks DNA delivers a personalized ride to runners of all different sizes, foot shapes and speeds. DRB? Accel shank-like unit promotes torsional rigidity in the mid-foot, while allowing the heel and forefoot to act independently. Segmented Crash Pad ensures smoother transitions. Forefoot Stable Pod Construction - Midsole and outsole components work together to center the foot for a more effective, balanced stride from heel strike through toe-off. Blown rubber forefoot offers lightweight cushioning and supreme durability. Flextra rubber outsole piece offers a varied degree of support corresponding with gender and weight for enhanced flexibility. Omega Flex Grooves allow for more natural forefoot moveé