Built on a low 14 mm, zero-drop platform, the ST-6 road running shoe promotes natural movement and flexibility, delivering a lightweight; The ZipFoam midsole adds just enough cushioning and rebound to keep the ride responsive and comfortable; The engineered recycled mesh upper delivers a secure and comfortable fit with excellent airflow to help keep feet cool during runs, gym workouts, and everyday wear; A flexible heel counter allows the shoe to collapse and pack flat, making the ST-6 road running easy to toss into a gym bag or suitcase for travel, training; With a minimalist build, durable 3 mm rubber outsole, and neutral support, the ST-6 is designed for runners and athletes who want one shoe; Heel to Toe Drop: 0mm