These worked great for me,
I got black and white =]
 although I accidentally got the black par stuck in a knot around the feet and had to cut them off.. but the legs sill held up with no runs! I just wear them as nifty leggings.
Also thigh-highs like these [with a few inches of elastic] are great to wear over tights to hold them up [especially if the thigh highs are fishnets.]