For the serious runner, every ounce matters when it comes to shoes. Short of running barefoot, the latest and greatest in ultra-lightweight foot gear is the New Balance RC5000 ($125). At roughly 3.1 ounces, you might as well be running on air. Except this air happens to be yellow with a metallic blue trim.

Designed with speed and high-performance running in mind, the RC5000 sits on a lightweight cushioned sole comprised of New Balance’s RevLite foam compound. The upper is a thin mesh skeleton that fits snugly around the foot for maximum stability. These are racing shoes, so there’s little in the way of additional cushioning aside from the sole, but that shouldn’t matter much once you hit your stride.

The RC5000 just hit stores this month, so snag a pair fast and get a leg up on the competition. Check them out at Running Warehouse.