Material: Shell: Polyester 100%; Core: Neoprene 100%. Bones: 4 steel bones Feature: SPECIAL DESIGN - Our zipper corset vest is equipped with zipper closure & 2 wide shoulder straps & 2 adjustable waist belts to ensure you could fit it at most extenet and give you a sexy natural curve. GATHER & PUSH UP BREAST - Special front U-type anti-droop design which helps the breasts push up, makes your chest more erect and attractive, effectively firm control armpit & back flabby fat to make your body no lumps or bumps or bulks. It can be worn with any regular or sports bra, giving you a beautiful hourglass figure. EFFICIENT WAIST CINCHER - Our body shaper helps postpartum recovery all process, reduce swelling, tighten skin, control tummy & back, relief postnatal pain, ease transition of uterus and shrink it down to normal size, make your maternity body get back to its original shape. LIGHTWEIGHT & COMFORTABLE & QUICK DRY - Made of three layers of neoprene composite fabric with the 2.1mm thickness, makes this weight loss cincher lighter and more comfortable than before,easier to hide under everyday clothes, but allow to move with your body while performing any gym activity,absorb sweat and let you always dry on the outside. SHAPE & DEFINE YOUR WAISTLINE - Our corset top with double layer high compression design, the inner layer with zipper allows you to adjust the compression you need and work as tuck belt to flatten your stomach instantly, and outer layer with double velcro hide bulges on your abdomen to create a smooth belly, enhancing your workout and shape your waist to be more slimmer. INCREASE FAT BURNING - Neoprene vest works as a sauna suit. Neoprene material helps raise our body temperature and keep body warm, just like a sauna around your abdomen,making you sweat 3 times more than ever before and increasing calories burning for a more effective workout. It also helps burn fat in the belly, waist and back, helping you lose a few inches in a short period of time, easier and faster to achieve slimming effect. BACK SUPPORT & POSTURE CONTROL - This body trainer which is builted-in 4 spiral steel bones also acts like a compression binder around the waist to offer abdominal compression and lumbar support to improve posture & relief waist pain & protect spine. SUITABLE FOR ANY WEIGHT LOSS PROGRAM - Our women sweat sauna vest can full coverage even your lower belly Best for zumba, yoga, gym, fitness, running, cycling, boxing, muscle building, fat burning and lose weight sports, reducing belly and re-shape figure activities.