Our Stayflex:tm: Chest Support gives firm support to users needing trunk control, without sacrificing comfortable shoulder movement. The patented dual-zone elastic construction virtually eliminates shifting upwards at the neckline when the user leans forward, avoiding strangulation risk. Heavy-duty knit nylon and foam rubber padding for strong elastic support. Quick-release swivel buckles on the lower straps for easy removal. This model is the non-zipper, Rear-pull version.