For a lightweight, responsive ride, the Brooks Puregrit 3 is for the neutral runner looking for a minimalist trail running shoe. BioMoGo DNA for cushioning and responsiveness that's tuned to the specific needs of each runner. Breathable mesh with a Nav Band that wraps across the instep for a secure, glove-like fit. Anatomical last contours to your foot for support. Omega Flex Grooves for more natural forefoot movement and fluidity. Tuned Density Midsole system changes the individual midsole density depending on the runner's gender and weight. Ideal Heel encourages contact points to shift forward, aligning your center of gravity for optimal spring with every step. BRS (Ballistic Rock Shield) disperses pressure from rocks, branches, etc. while still keeping the forefoot flexible for a terrain-compliant ride Toe Flex split-toe feature augments forefoot flexibility and promotes the big toe to engage the runner's natural stability and power during push-off. Wt. 9.9 oz.