HOW TO CHOOSE YOUR SIZE – Using a soft / flexible tape measure, find the circumference of your waist at its narrowest point, in inches. Size XL fits waists ranging from 40”-45”. FULL BODY BRACE – Supports your back and holds the spine straight, protecting you from movements that could derail your recovery from a mid- or low-back injury. MECHANICAL PULLEY SYSTEM – You can easily generate abdominal compression that relieves pressure on the spine thanks to the support’s pulley system that multiplies your force by five. EASY TO USE – Soft padding, breathable materials, and a spinal cutout make the TLSO comfortable to wear. Fastener and quick-release buckles make it easy to put on, take off, or adjust the brace. You won’t need any special tools for adjustments. NATURAL TREATMENT – Use for pain stemming from kyphosis, osteoporosis, bad posture, hyperextension, spinal compression fractures, spinal stenosis, mechanical back pain, and more. Use at many stages, including before and after surgery, thanks to its removable panels. It’s great for all ages.