Designed To Promote Proper Posture And Good Body Mechanics To Help Maintain A Healthy Back Can Be Used While Lifting Pushing Pulling Walking Exercising And Repetitive Bending Or Twisting Size Md/lg Fits Waist Circum. 33 -40 The Obusforme Back Belt Unisex Design Accommodates Most Physiques Conforms And Supports The Lower Back Promoting Muscle Relaxation And Proper Alignment Of The Back Built-in Ventilated Lumbar Pad Provides Additional Support To The Lumbar Area Breathable Nylon Mesh Wrap With Adjustable Hook And Loop Front Closure Holds The Belt In Place Lightweight; Sleek Stylish Low Profile. Wear On Top Of Or Under Clothing Designed For Industrial And/or Personal Usage; Any Profession And Task Where Proper Posture And Good Body Mechanics Are Important All Materials Are Hypoallergenic Hand-wash Unisex Design Accommodates Most Physiques