Uniqlo maternity denim. The waist is elastic and adjustable. I wore it a few times during my pregnancy, but didn't use it much. I have a dog at home, so please refrain from purchasing if you have allergies. This is a used item, so please refrain from purchasing if you are looking for the same quality as a new item. Also, it will be folded for shipping, so there may be creases. Thank you for your understanding.