First, confirm whether you have an account in Flannels. If not, you can create it first. Then select your favorite Flannels product and add it to the shopping cart. Click the calculated button, and finally, jump to the Flannels payment page. After clicking, you can select the Flannels coupon code you need to use, and then return to the payment page to continue the payment. It should be noted that the used Flannels coupon codes will be automatically removed from your coupon.