Simply take your 6 x FBB cards to your nearest Shoes & Sox store. At the checkout, show your cards to your sales assistant who will calculate the average value of your 6 pairs, and deduct that from the full price value of your "free” pair. If your average value is equal to, or more than, the price of your "free” pair, you will receive the pair entirely for free.
Once you have collected your 6 x FBB cards, you will need a special discount code to redeem your free pair online. Please contact us for more information and for instructions on how to send us your FBB cards in exchange for your discount code.