Product Description: Copper Fit Back Pro Support Wrap is a compression belt that helps support lower back muscles so you can move more confidently and comfortable throughout your day. It is designed for everyone from weekend warriors to pro athletes, construction workers, gardeners and much more. If you desire easier movement with joint and muscle support, the benefits of the Copper Fit compression wrap can help improve your daily lifestyle. Copper Fit compression products are manufactured with copper ions bound at the fiber level during the manufacturing process. The copper fit process will not easily wash out or quickly wear away and has been tested to remain effective for numerous washes. The Copper Fit compression back support provides muscle and joint support to help you move more comfortably through your day. Perfect for people at all ages. Whether you are a performance athlete, have a physically demanding job, or just have everyday aches & pain The contoured, slim and lightweight design fits discreetly under clothes. How do I determine sizing? The sleeve includes adjustable compression straps to customize your fit for form-fitting support. There is a chart that makes finding the right Copper Fit size simple. All you need to do is take an easy waist measurement and find the corresponding size on the chart. Sizing Waist S/M – 28″ – 39″ L/XL – 39″ – 50″.