Trainer’s choice 500 braces use a high density foam pad in the back to absorb shocks, while the sides are made of spandex to help keep the brace cool, it also comes with suspenders that are also removable if not needed. delivers firm and comfortable broad lower back support with enhanced abdominal support when lifting, standing, sitting or driving. enhanced intra-abdominal pressure diffuses concentration of stress away from the spine. retains positive reflected body heat keeping muscles flexible and ready for action. limits pelvic flexion to help restore proper alignment of the spine and maintain uniform compressive loading of discs when lifting. promotes proper posture and correct lifting techniques.