Ecco’s Biom A and B models impressed our earlier testers as being dialed in for racing or fast and short training but a little too wired for longer days. Enter the Biom C. This style is geared down for greater comfort, despite its fast look. Our testers are pleased with the C’s foot-conforming “sock-like” fit and out-of-the-box comfort. Try this shoe on because our testers find that it runs a little on the big side. And with its non-traditional anatomically hugging design, you’ll want to make sure to get the fit right so you can enjoy the full benefits of this new model.