The Waist Trainer for Women by Yianna is a firm compression shapewear designed for sports and fitness. It features 25 steel bones for added support and has a compression area focused on the waist and abdomen. The black color and size 3XL make it suitable for a wide range of body types. With a free 30-day money-back guarantee and free fast shipping, this underbust shapewear offers a comfortable and effective way to control and shape the waist area.