Women Butt Lifter Panties Seamless Hip Pads Enhancer Underwear Padded Panty

Is there an opening for going to the bathroom?

Do dresses slide over these or do they grab onto dresses & skirts?

Is the white see-through? I want it for under my white mini dress, for full coverage in case the breeze blows it up.

How tight is the leg. Will there be a bulge or line under satin pants?