Our waist trainer can enhance the compression around your waist for helping you to control your size and shape. The semi-automatic locking design prevents the zipper from slipping off while on the move. Perfect belt for everyday workouts, during work,everyday wear, yoga, postpartum recovery, gym, running, sports, body shaping and more. It keeps you warm during your fitness training when doing outdoor sports for a long time in very cold weather. Consists of 7 high-quality steel spiral that support your back and also prevent curling. This keeps your back straight,reduces pains and sustain your muscles for helping you to improve your posture.