Dual strap system stabilizes lower back and supports abdominal muscles. Lumbar pad is designed for added support. Aerated neoprene reduces excess heat build-up allows perspiration to pass through holes to keep body drier. Provides comfortable and uniform compression. Designed to provide you with the optimal support you need while assuring fit and comfort. Support Level 3: Provides the highest level of support and stabilization, using flexible, hinged, plastic and/or Aluminum stabilizers to help reduce risk of re-injury and relieve symptoms associated with acute injuries. Measure waist. Size= adjust to fit. In= up to 48 waist/hip. Cm= up to 122 waist/hip. Fits comfortably under clothing. Product Benefits.