Didn't even know what they were until I saw them on this site. Length is great just barely peeks out under my skirt if I wear it high waisted. Really puffs the skirt out, the pictures are a comparison of with and without so you can get a feel for how much of a difference it makes. I never wear an outfit without it. Material is slightly irritating when worn for a while, but it's only really when sitting down. One thing I noticed is it has a very slight blue tint, not sure if it was always like that. Hardly an issue though it's barely noticeable, and it might be because of the skirt I have. It bleeds like crazy when I wash it so I could just be from me wearing them together all the time. Can't see it being an issue with any of the other colors. Now, my one and ONLY complaint is, the way the waistband is will occasionally DIG into your sides when you wear it for long periods of time and it hurts. Only happens sometimes though and I've found if I just pull it up a little past my hips and onto my stomach it doesn't happen that much. Overall a quality product and I HIGHLY recommend it to anyone that has found their skirts looking sad and flat. Truly a must have, everyone should have at least one!