Breathable. Supportive. Nike Flyknit technology uses high-strength fibers to create lightweight uppers with targeted areas of support, stretch and breathability.

The Ziploc Bag Trick. A good way to stretch out your sneakers overnight is by getting a Ziploc bags, filling them with water, and stuffing them inside of your shoes. You'll then put your shoes in the freezer overnight, where the water will freeze, causing it to expand and open up your shoes some more.

Nike introduced its Flyknit technology in 2012 and little did they know it would define an era of sneakers.

If you're fast enough, the Flyknit Racer would have an excellent track-like racing flat. World-class elites have been seen wearing the Racer for marathons but unless you're really fast, you might not be able to do that. Personally, this is a perfect shoe for speed work and races up to 10K.