If you wanted to run flat, easy trails then you'd go to the park and run those smooth gravel paths, but you'd rather run in the mountains where the trails are steep, technical, and demand an aggressive shoe like the Adidas Men's Terrex Agravic GTX Shoe. Designed with high-intensity, technical trails in mind, the Agravic has an aggressive Continental rubber sole with a tread pattern cribbed from mountain bike tires. A cushy layer of EVA protects against the rocks and logs you'll encounter out on your run, while Adidas' Boost technology helps keep some extra bounce in your step during those high-mileage leg grinders. The Agravic's upper was built to put the handle on rugged terrain thanks to a combination of textile fabric and welded overlays to help add support. And since trails are rarely perfectly dry and there's almost always a chance of rain, Adidas gave the Agravic a Gore-Tex membrane to keep your feet and socks dry when you inevitably encounter moisture out there.