Everbellus Women's High Elastic Waist Trainer Vest Corset for Weight Loss Steel Boned Body Shaper Material: 90% Polyester, 5% Cotton, 5% Elastan Please measure your current waistline and refer to our size information before ordering. Please dont use Amazon size chart and dont follow your normal size. This waist trimmer is supported by 6 spiral steel bones inside the corset. It's flexible and durable, as soft as plastic bones, bending easily but recovers quickly to origin. High waist cincher has 3 rows of hook-and-eye closure for the size adjustment for the shrinking midsection. It can help you lose weight, improve overall posture, and get rid of belly fat to achieve a fashionable hourglass figure. This comfort waist shaper is suitable for everyday wear and during workout, yoga, postpartum or doing any other physical activities.