This is the all time best selling Roll Down style 330 in Past Midnight (which is really just Navy Blue) made from a simple but effective blend of cotton and lycra. They roll down at the waist and hug your butt and thighs. Extremely flattering through the waist, hips, and thighs. From the knee down they gracefully flow out into a boot cut hem. This is an outstanding working or athleisure legging. Most people who buy them figure out a way to live in them as much as possible! They are 90% cotton and 10% lycra. Pre-shrunk.