[Necessary for pregnant mothers]: The elastic support belt is our belt specially designed for pregnant women. You can move and adjust the size during pregnancy to help you stay comfortable during pregnancy. Please be careful not to be too tight, as you need to leave some space.[Relieve Abdomen and Waist Pain] In order to alleviate low back pain, our maternity clothes and appropriate adjustments will help support the abdomen, at the same time reduce low back pain, avoid pubic pain and cause physical discomfort. To relieve the pressure on the pelvis, you can use the abdominal support belt to reduce the weight of the child, especially for twins and multiple mothers. Excessive abdominal pressure affects mothers.[No harm to baby]: The 45-degree lifting angle protects the baby's fetal position in the abdomen.[Comfortable materials]: We are committed to providing safe and comfortable products for mothers in need. This is why we use cotton, fish tape, and polyester materials to achieve the perfect balance of lasting support and comfort.[Size] M size is suitable for abdomen circumference 80-110cm, L size is suitable for abdomen circumference 90-120cm, XL size is suitable for abdomen circumference 100-130cm, 2XL size is suitable for abdomen circumference 110-140cm.