This is a Pigeon pelvic belt that you wear. I used it as a belly band for about a month, starting around 6 months of pregnancy. I gained too much weight and couldn't wear it in the later stages, so I've been storing it at home. These are comfortable maternity pants, made of a mix of polyester and polyurethane for stretch. - Size: M - Material: 65% polyester, 35% polyurethane Thank you for looking.