The Harbinger 4.5" Unisex Foam Core Weight Lifting Belt is designed to stabilize core muscles and support your lower back during lifting. The flexible, ultra-light foam core allows for full range of motion during functional strength training without ever interfering with your movement. A hook and loop fastener provides a strong hold, no snagging, and easy transitioning between movements. The steel roller buckle glides smoothly and allows a secure, customized fit. The belt is to be worn tightly around the natural waist to provide the best stabilization. The Foam Core Belt is suited to perform Olympic lifts such as snatches and cleans. Its low profile will not interfere with a close-to-body bar path. Features: Versatile low profile belt for moderate lifting and functional movements. 4.5" width meets IWF competition standards. Designed for both men and women. Sizing: X-Small - 23" to 29" waist. Small - 29" to 33" waist. Medium - 33" to 37" waist. Large - 37" to 42" waist. X-Large - 42" to 48" waist.