Extra wide 5 inch strength training belt with 3 inch support strap provides maximum lower back and abdominal support for heavier liftsThick, flexible ultra-light closed cell foam provides maximum comfort and maintains muscle warmthHeavy gauge steel roller buckle makes tensioning simple and easy; plush tricot lining is comfortable against skinDurable abrasion resistant fabric flame laminated directly to foam core to prevent fraying and pillingMeasure around the waist between the hips and the ribs to determine proper size L (33-37 inches)