The Shape Z Acupressure Self-Heating Shaping Sock stimulate the acupuncture points of the feet and improve blood circulation, keeping your feet pain-free, cozy, and warm in cold climates. The Acupressure Self-heating Socks feature the combined benefits of foot reflexology and acupressure, which share the similar concept of stimulating pressure points (acupoints) to promote healing and relaxation. The Acupressure Self-heating Socks also use tourmaline properties to emit infrared waves and transmit heat directly to the skin, keeping your feet warm and comfortable in cold weather. Although this product has self-heating properties, its sweat-absorbing feature prevents moisture which attracts odor-causing bacteria. 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.