Seamless High Waist Shapewear with Thigh Compression. This is the best seamless undergarment I could find for clingy dresses – and I’ve tried a lot. It has no panty or waistband lines, and doesn’t smoosh your butt flat. The leg opening edges do show under clothing, but at least they don’t roll up. I like the idea of this shaper because it enhances what you have, without any fake padding. It’s a little thick and restricting for daily wear, but is great when you want to look your best for a special occasion. Leonisa makes a quality product for a fair price.