On Sunday, New York celebrates its fittest when the New York City Marathon rolls through town. For the more motivated among our social network, it's the time of year to do something crazy. For the rest of us, it's a great day to get drunk and high-five people in their "Doing it for Jimmy" T-shirts. Puma is getting in on the Marathon fun this year by releasing the Faas 300, a lightweight runner for race days that also doubles as a casual sneaker for hitting the streets. We've seen a few upcoming colorways of the shoe, and the spring versions blend classic Puma design elements with a solid futuristic look. For the Marathon, the shoe drops in a silver and brick-red color for men and a silver and chalk-blue color for women. The shoe retails this weekend in New York for $85, and you can cop a pair at the Puma booth at the Marathon Health and Fitness Expo located at the Jacob Javits Center through Sunday.