The thuasne lombax high dorsal-lumbar support helps support the dorsal and lumbar regions compressing the area to stabilise your back and reduce your pain. the lombax high lumbar belt is a high back support belt in durable fabric easy to put on thanks to its two-part closure system and straps. the strap system allows easy adjustment of the restraint. as the lombax high support uses lombax fabric it provides you with high elastic compression to prevent instability and discomfort in the region. this makes the brace perfect for when you’ve recently had surgery in the area and need addition support while you recover. the support can also be used for those who are suffering from acute lower back pain.size guidethuasne's dorsal-lumbar support is available with a height of either 35cm or 40cm. measure the circumference of your waist and consult the table below to find out which size you need.size waist circumference (cm)extra small 52 - 62cmsmall 63 - 74cmmedium 75 - 89cmlarge 90 - 105cmextra large 106 - 120cmxx-large 121 - 140cm