The coupons are used as follows: Add your favorite items to the cart, then click to log in or create a new account, then go back blackdiamondequipment.com shopping cart interface, and select the items you want to buy. Then, click the Calculate button, and finally jump to the payment page, you will see the information of [Select your discount code], click to select the discount code you want to use, and then return to the payment page to continue to complete the payment.