Yes, the cost of a return must be borne by the customer. Please don't forget to sufficiently stamp your package.
Keep in mind that returns need to be sent to our warehouse in Germany.
You can qualify for free returns if you have paid for your order through Paypal. You can find more information here about how this process works.
If you have any questions regarding this, please contact Paypal directly. This is a Paypal service which we have no direct control over.