Nike is relaunching the 1991 Air Max 180 and to celebrate they're offering a limited number of customers the opportunity to design their own pair using the Nike iD system. There are 11 days left and it's rumored that only 20 pairs are sold each day. Also, while the customized pair costs $85, you also have to purchase a White Label original T-shirt for $65 for your order to be qualified. Lots of rules, but worth it none-the-less. Check out the site because even if you can't buy a pair today, you can play with the customizer.