I must have an odd shaped body but to fit my butt and legs on my jeans tend to be big in the waist. They were always sagging and almost falling off of me. This belt literally saved me from having a bunch of expensive alterations and does not show under the blouse or sweaters that I wear with the pants.
I hate the bulkiness that belt buckles can add to an outfit, so was in heaven when I discovered the invisibelt. It also helps with that "gap" that often occurs to me with waistlines in the back - I'm sure because my waist and my hips are out of proportion! When I bought mine, there were only two choices: black or clear, both in regular sizes and the original width. Now they have added several other options - silver lace, pink, and gray styles, a skinny width, and plus sizes. When the belt arrived, I wondered at first because it's a thick plastic and I just wasn't sure how sturdy it would be. But a year later, it has been fantastic and is as good as new! I have a black one, but am about to order a new clear one as well. The only thing I wish they'd add now is a brown style!