Skinstore.com typically allows only one promotional code to be applied per order. When placing an order, customers must select the most beneficial code available to them, as combining multiple codes is generally not allowed. Each promotional code may have its own terms and conditions, so it is advisable to review these details before applying a code. If you have received several promotional offers, consider which one provides the greatest discount or benefit for your purchase. For further information on current promotions or specific offers, customers are encouraged to visit the promotions section on the Skinstore.com website.