Adidas Test Run 28 Supernova Sneaker

If the perfect shoe makes all the difference, the Adidas Test Run 28 Supernova Sneaker ($95) is a great pair you can test out before buying. Try them out for 28 days, and if they're not quite right, Adidas will take them back and refund your money. It's a great way to make sure your feet are getting the perfect amount of cushioning and fit needed.