uSERENE Stress and Anxiety Breathing Straw is a small and simple-to-use device that helps you to combat stress and anxiety with practiced slow pace breathing. From medical grade stainless steel and fashionable appearance, you can wear it and fight against anxiety whenever, wherever. The device is scientifically effective and was recommended by thousands of experts. OUR GUARANTEE We are confident that we offer some of the best products on the market. Therefore, we provide a 30-day guarantee. We will make every effort to ensure that you are completely satisfied with your purchase. Online shopping can seem daunting. We want you to know that there is absolutely zero risk of purchasing something. We won't make it difficult if you don't love it. We offer email and ticket support 24 hours a day, 7 days a week. If you require assistance, please contact us. Please contact customer service if you have any problems with your purchase.