Contest ends September 14, 2012, 5pm PT. No purchase necessary. One entry per person please. Void where prohibited by law. Contest is open to US and Canada residents only. Odds of winning are based on the number of eligible entries received. Contestants must be 18 years of age or older to participate. See Kai Run employees and their families are prohibited from entering. Gift certificate is for use on seekairun.com and is limited to stock on hand. Winners will be notified via e-mail and announced on Facebook.