Ok - These are MY GO TO under shorts. Not so much for sucking things in but for comfort. No matter how thin I've been (even down to 15% body fat) I've always had thigh rub. The chaffing is horrible. I refuse to let this happen anymore!  So I buy these, or the black pair. They are perfect as they don't ride up or down. They stay in place and don't create weird lines. I buy a pair larger than they recommend as I'm not trying to make anything smaller. I love them! Bonus - I never have to worry about falling and showing my ass when wearing a dress or skirt ;)