We are so certain that you will find RunnersXL™ to do everything we claim that we are proudly offering a no-hassle, 30-day money-back guarantee.  If you try RunnersXL™ and find that it doesn't boost your running performance, return the remainder of the product for a full refund.  Simply send an e-mail to returns@runnersxl.com with your name and order information and we will promptly send you return instructions.