Firm high waist controls are waist trainers,girdles,shapers,and control. They work the same way ”compressing”. The skin is an organ which expands and contracts. Very firm and durable. The waist training area is around the tummy only as it doesn’t affect the hip and butt. This waist shape wear works as a butt lifter and the butt area is free size. It doesn’t roll down when you sit or bend. Works very well with proven results. Be fit and stay in shape!