You have to be be registered and logged-in to use a PROMO CODE.

After logging-in in the web site, you can click the writing "USE A PROMO CODE" in the top bar of the Home Page.
A window asking for the promo code will appear.
If the code is valid, the category "SPECIAL PROMO" will appear on the top of the products' categories and the list of the promotional items inside will be shown.

While browsing the site, you can get back to the "SPECIAL PROMO" category that will be marked in red on the top of the categories' list, any time you wish to.

After the first access, you can get in this category again, without limitations, up to the expiration date of the code and upon items availability.