Gap and sister company Banana Republic. Or just read the headline again, because I just repeated myself.
The catch is Gap discounts end November 11, while Banana Republiic's runs through Thursday.
This discount includes regular and sale items across their stores. Each sale has it's own promo code, which I posted below. Also, if you spend $50 or more shipping is included free of charge.
Click here to go to Gap and use code GAPFRIENDS for the discount.
Click here to go to Banana Republic and use code BRSHOP30 for the discount.