I was thrilled when my niece recommended the sheer thigh highs from Commando. I ordered them and wore them for the very first time tonight for my anniversary celebration at a restaurant. The thigh high on my left leg worked wonderfully--I barely knew it was there. Unfortunately, the one on my right leg kept slipping down the entire evening. I kept having to pull it up. This shouldn't happen to brand new thigh highs, right out of the box, should it? I'm so disappointed (especially since the other one worked so well. I purchased a size M/L, which does not seem to be an option below. Also, regarding size: one leg fit perfectly, the other was too big, hence my designation as "Runs Large."