Our belly wrap is made of stretchy spandex and nylon and features a strong wrap that flattens your abdomen, reduces belly fat and creates a perfect waist curve The waist is ergonomically designed curved type, which makes the lower abdominal contraction effect more evident and slimming effect Anti-sagging design makes your chest more upright and attractive, effectively and firmly control your underarm and back fat and eliminate bulk, bulky Please measure your waist size and choose according to the size chart before purchasing a women's waist trainer under your clothes. The smaller size has strong shaping effect, and the larger size is relatively comfortable to wear Women waist nipper is made of 15 high quality elastic bones, which is soft, flexible and durable