These leggings are buttery soft and thick enough that they're not see-through and do not show sweat marks. They are 100% squat proof and stay up when you bend, stretch or jump. Extremely flattering, they don't dig in (no muffin top) but still give tight flattering support. Love that there's no front seam! These are my favorite black leggings and will be ordering in more colors. I'm a true medium, size 28/29 jean and the size 8 fits me perfectly.