How to select correct size? Measure your waist circumference at your navel. Skip guessing from pant sizes. Size Chart: S (23.6-27 inches), M (28-37.4 inches), L (37.4-43.3 inches), XL (43.3-51.1 inches) ULTRA-THIN & LIGHTWEIGHT: Crafted from 0.5 mm ultra-thin yoga fabric, Fitomo back brace for women men designed to be worn discreetly under clothing, ensures superior comfort. Ideal for heavy lifting, sitting, standing all day, workouts TARGETED RELIEF: Fitomo back brace for women men strategically designed a detachable lumbar pad targets back pain areas precisely for effective and long-lasting lower back pain relief SEAMLESS ONE-PIECE DESIGN: Fitomo ultra thin back brace for women men is constructed from seamless one-piece yoga fabric, which ensures durability and longevity, without the risk of falling apart after repeated use ENHANCED SUPPORT: Incorporates 6 flexible support stays and dual adjustable tension straps, Fitomo ultra thin back brace for women men offers comprehensive support while allowing for natural movement and flexibility SPINE STABILITY & POSTURE SUPPORT: Fitomo back brace for women men helps reduce stress on the spine, providing immediate lower back pain relief, stability, and maintaining an upright posture whether sitting or standing Can it be worn during exercise? Fitomo back brace features a removable lumbar pad, offering greater flexibility and making it suitable for activities like running, hiking, tennis, gardening, and strenuous physical work without restricting movement Is it comfortable all day? Fitomo back brace for women men is designed for all day comfort. Crafted with seamless, tag-free yoga fabric, it feels soft against the skin and offers breathability for extended wear Material: Nylon 80%, Spandex 15%, Plastic 5%(stabilizers)