It's very easy to use a Promotional code. Click on "Show Coupon Code". Copy the code and be ready to start shopping.
Here is how:
1. Go to store.diesel.com.
2. Click on a category of your choice, for example "Kid".
3. Click on a sub category, for example "Accessories".
4. Click on the item you want on the new page.
5. On the next page with your item description, click on "Add to shopping bag".
6. When the pop up window appears, click on "Proceed to purchase".
Type in your code into the field "Please enter your promotional code" and click on "Apply".