Xendurance’s Guarantee Policy: If for any reason you are not totally satisfied with any one of our products we ask that you return the unused product, along with a brief description of why you are not satisfied and we will gladly refund 100% of the product’s purchase price, excluding ship costs. This refund is valid for 3 months after the purchase date. Please contact us via phone; 0031-(0)77-352-8508, or email kontakt@xendurance.com to inform us of your return.