These are a nylon material, not like regular spanx. With that said, they still smoothed out my legs and were comfortable to wear. I was hoping for a little more shaping in the belly area, but it doesn't have much support.
They are exactly what I needed to help smooth things out as I get used to my new pregnant body! The material is tight but gives plenty of space for the belly to not feel suffocated. I want to wear these under everything!