Harbinger's 5-Inch Foam Core Belt is for serious weightlifters needing back support. The Harbinger Foam Core weightlifting belt features an extra wide 5-inch closed cell foam belt with a 3-inch support strap overlay for maximum lower back and abdominal protection during heavy lifting. The flexible but lightweight foam core surrounded by abrasion-resistant nylon supports the back while maintaining muscle warmth. The heavy gauge steel roller buckle makes tensioning easy, and the plush tricot lining is comfortable against the skin. Like all Harbinger products, the 5-Inch Foam Core Weightlifting Belt comes with a 90-day manufacturer's warranty. Harbinger 5-Inch Foam Core Weightlifting Belts are available in four sizes, each designed to fit a range of waist measurements: Small fits 24-29 inches, Medium fits 29-33 inches, Large fits 33-37 inches, and Extra-large fits 37-42 inches. Do not use pant size to determine the size of the weightlifting belt; measure around the waist between the hips and the ribs, starting and stopping at the belly button.