The Original Walkvest Training System by Debbie Rocker Helps you burn excess calories, tone muscle, condition abs, and build bone density Safely lose weight, strengthen your abs, protect your lower back and improve posture Includes 8 half-pound weights, upgradable to 16 lbs. (12 lbs. with the small size) with additional weight (purchased separately) Includes Debbie Rocker&#8217;s free introductory walking workout CD By carrying extra weight bones are forced to grow denser and stronger, which can help to prevent osteoporosis