The dreaded waistband gap is not pleasant for anyone. Coin slot, butt cleavage, plumber’s crack—whatever you want to call it, it ain’t good. Enter isABelt. This half-inch plastic belt is designed to eliminate back gap and belt bulk and provide a slimming effect at the same time. I don’t know about tucking in (even though the plastic is clear, you can still see it), but it will definitely smooth things over when a shirt is worn outside the pants. And besides all that, now you won’t need this.