The Flux adapt trail runner is perfect for those that love Altra shoes. Zero drop, grounding technology, cushioned foot massage pad insoles. Very grippy, simply the best most comfortable trail shoe. So why am I selling these? Because I am used to Vivo barefoot trail shoes I want something with a tad more cushion, these are not it, these are definitely cushioned. I only used these for 5 hours. I am still labeling them as new.