I have several pair of nude and black, they've held up marvelously wash after wash, I can't imagine wearing anything else under my work-slacks and my dress-slacks, they are just the right weight and they provide just the right amount of support. Very comfortable!
I am a big fan of spanx (I wear them under all of my dresses and skirts) and these are by far the most comfortable pair I have ever bought. I ordered a pair a few months ago and just ordered 2 more. Highly recommend!