The comfortable Posture Correction Vest may help pull your shoulders back into a more aligned positioning. Use to help keep your form while working out, or while doing physical labor. The fully adjustable vest wraps around the torso and has a hook and loop closure. The posture vest comes in an assortment of waist sizes including small (27.5"-33.4"), medium (31.4"x37.4"), large (35.4"x41.3"), and extra-large (39.3" x 45.2"). Comes packaged inside a sturdy box with a size chart located on the bottom.