I'm wondering if anyone has experience with these leggings:

They look kind of see through in the picture, but the description suggests wearing them as active wear...

I've recently made a commitment to limit my clothing purchases to responsibly produced new clothing, or used clothing- and am in the market for some maternity leggings.
But used leggings kind of gross me out a little bit, and not surprisingly its hard to find maternity wear that fits my other requirement. I may just have to size up in a different brand with a lower waistband.