The 25 Best Sneakers of Summer 2013Matt Halfhill | Sep 23, 2013This post may contain affiliate links. Please read our disclosure policy.18. Nike Air Tech Challenge II “US Open” This new colorway of the Nike Air Tech Challenge II sold out faster than a tennis serve, and for good reason. Pages: 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25