HOW AMFIZZ Tourmaline Lymphvity Slimming Health Sock WORKS? While acupuncture uses needles to pierce or puncture the skin, this approach is made more convenient and easier by combining different pressures (acupressure) & stimulation on the surface of your skin using the tourmaline materials from this health sock. The tourmaline properties of the socks do not only target the natural acupressure points it also releases negative ions and emits infrared waves that transmit heat deep into the body, forcing the body to burn more calories. Infrared heat is absorbed by cells, causing a physical phenomenon called resonance. Thus the cellular activities are instantly invigorated, resulting in better blood circulation and overall improved metabolism. 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.