No discount code required as 20% discount is applied at checkout.
My health professional friends all swear by this brand of footwear.
Make sure you link through Cash Rewards to get 7% cash back.
Combine with AMEX Paypal statement credit deal (spend over $100, get $20 back) for those who have registered.
Also highly recommend Frankie4. Absolutely the comfiest shoes I've ever worn, especially for walking about while travelling.