Velcro fastenings and hand straps allow for a perfect fit with easy application and adjustment, even for people with arthritis. ENSURE CORRECT FIT AND SIZING: Using your belly button as your starting point, measure 1" down from your belly button. Then measure your waist circumference from this point. Make sure measure tape is not too tight or too loose. Refer to sizing chart & video for correct sizing. Promotes proprioception, thus heightening sensory awareness in the lower back for increased stabilization. Four, 9 1/4" flexible aluminum rods in the back section align the lumbar spine and help it to adopt an anatomically correct and thus pain-free posture. Lightweight, breathable knit will not retain heat and is machine washable. THE BAUERFEIND STANDARD OF QUALITY: All Bauerfeind products are made in Germany with the highest manufacturing standards to ensure superior quality. Bauerfeind technology has evolved over the past 80+ years and continues to set the standard in fit, comfort, support and performance.