Product DetailsThe GT-1000™ 5 shoe features our GEL® Technology for shock attenuation and a more comfortable stride. Mesh panels on the upper increase breathability and support across the forefoot, while cutting down on irritation and blistering caused by traditional overlays, keeping feet cool and comfortable so you can run longer with greater comfort. Weight: 8.8. Heel Height: 21mm. Forefoot Height: 11mm.