If you are facing problem using coupon code, here how you can apply it:
First: Click on Cart icon and click on the “View Cart” button
Second: Type the coupon code under “Use Coupon Code” option and click on “Apply Coupon” and you will see success message.
Important: SHIPFREE coupon code works only if your cart value is above 100 USD, if your cart value is below 100 USD, it will not work.