Excellent used condition - I ran less than 20 miles on these in my ON Running Cloudmonster 2 shoes. From the website: “Flexible support and shock absorbing cushioning from heel to toe help reduce fatigue, prevent common running injuries, and boost performance. Dynamic arch support insole with a deep decoupled heel cup fits, wraps and locks the heel in place to improve stability, reduce pressure, and provide a perfect fit. Rebound cushioning and controlled power transmission provide faster regeneration and powerful propulsion with every stride. Performance insoles feature a zero heel drop, providing the best fit in most running shoes with optimized motion for all running foot strikes. Helps manage moisture with mesh top layer and premium foam cushioning to keep feet dry and running shoes fresh.”