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I bought these to wear under a dress and they serve that purpose well. The fabric is stretchy and slick, so it won’t show any lines. I bought a pair of stretchy cotton “biker short” style shorts as well and much preferred the quality of these. These are a thin material which is great for not showing any lines and providing a subtle smoothing effect, but don’t expect them to work magic like Spanxx. Pay attention to the inseam length in the photo as these were almost too long for my dress which was above the knee but definitely not a “mini” length.
I agree with other reviewers that they do work well for smoothing but I would have liked a bit more support in the tummy area. These are the first pair of these types of shorts that I have not had to yank on the leg part all day long. Literally forgot I was wearing them!