Our Supreme 25 Flexi Steel Boned Zip Core Trainer in Black is the strongest body sculptor in our range providing the highest level of waist compression. Made from latex, this waist trainer features 25 rows of Flexi steel boning to give an instant waist reduction. This is the ultimate core trainer for the serious waist trainer giving the maximum level of body shaping. Wear at the gym, during work outs, while at work or as your everyday trainer.